If you just need one, instead of a pair, any federal government services office should be able to provide you with pogie.

I decided to try pogies, handlebar mitts, handlebar muffs, etc. or whatever you want to call them, as my overmitts from the MEC had worn out.
A former co-worker had made his own pogies (they looked really nice) and I thought this would be a good time to try my own pair.

The handlebar was mountain bike bar, not a road bike, making it easy to add them.

Being both lazy and cheap or ingenious and cost efficient as my resume says, I bought a pair of ATV mitts from Canadian Tire.
The price was around $35-40. CDN Tire was chosen as I wanted to test them first, with product return in mind if the didn't work.
I'm certain that a custom made set would be awesome.
They were covered in a Mossy Oak­® pattern cordura nylon (I believe) and had fake sheep's wool inner lining.

Installation:
It was a breeze.
First remove your lights and bell, as they'll need to be outside the pogies.
Then slide them over everything, leaving room for the lights and bell to be reattached to the handle bar. (I did think about mounting a dashboard for the lights)
Tighten the straps down as much as possible. (there is a lot of extra strapping, ATV handle bars are probably thickly padded.)
Reattach the lights and bell.

Performance:
These "cheap" pogies have worked extremely well.
I had a pair of "Factory Direct Deerskin Gloves" similar to the Mechanix® brand, that I bought at the Stampede, to wear when I cycle year round.
They are thicker than the regular full finger gloves that you find a the MEC. (Which I was grateful for after I was ran over by a car last May).
At -15°C my hands were not cold, they weren't hot, but not cold.
At a temperature of 0°C my hands were quite warm, even a little sweaty.
During a +15°C chinook, I just rolled the pogies down to create as much air flow as possible.
When compared to the MEC mitts that I used to wear over the same gloves, my hands were no longer soaked at the end of my ride.
When the weather was warm and there was a lot of water on the streets the pogies did not leak.

The "controls" for the bike were never jammed, crowded or accidently engaged by the pogies.
It did take a little time to get used to knowing the gear by pedal feel, as I couldn't see the indicator. (although, I could look down at the cassette).
The was enough room inside to manipulate the shifters and brakes, just as I did in the summer time.
Accessing the lights was not a problem as I turned them on once and usually left them on until I arrived at work.
The bell was another story. It was hard finding a place to mount it that was easily accessible and still audible for pedestrians.
Sometimes when there were a lot of people infront of me, I would keep my bell hand out of the pogie for a short time, so I could ring the bell every few metres.
Of course I could have yelled at them, but my Cybowing anti-fog facemask from Korea muffled my voice. (review of the Cybowing to follow)

Modifications:
Did I modifiy the pogies? Yes.
They have a very wide "mouth" where your hands go in and I wanted to narrow it down.
As I wasn't sure the pogies would work, I didn't want to change them in a manner that would prevent CDN Tire from taking them back.
So, I used two giant black paper clips (per side) from the office to narrow the opening.
The clips worked very well and only came off when I had to scrape through a hedge to avoid a collision with a dog

Added benefit. I found something of value on the path one morning, rather than take off my back pack, I just slide it into one of the pogies and carried on.

Crashes!
One time my hands didn't come out, as I was down in a flash.
The other time, I fell to the left and my right hand came out, but the left didn't. Go figure.
Another time in Eagle Ridge I turned too soon, hit an ice ridge, and the bike fell out from under me.
I was left standing and the bike was laying on the ground.
Both of my hands free of the pogies.
Simply, you want them kind of snug, but not tight.

Theft:
I park my bike in my office, so I didn't have any worries. In a public place, who knows?
An aside, if you had to park out side on a miserable day, you might want to remove them to keep them dry.

Summary:
I have been converted. Pogies are certainly the way to go. They were warm, dry and never hindered my ride.
Every time I rode the bike I knew where my "mitts" were. They were attached to the bike. No more looking for lost mittens!
One thing that I would want on a custom pair is some reflective material.
I can think of only 1 reason not to give them a try: The added weight. Some people don't want any extra weight on the bike, and pogies do have some mass (I never noticed)

Thanks for reading if you made it this far.

I am.

Drbobsled

thanks Dr. Bobsled, you are now a pogie pro! thanks for that detailed review.

What I'd like to see next is a review of one of Lady29's pogies. Any couriers out there using them? Danimal?

i've never used them, but wondering whether you leave them on your bike all winter? if you do, are you worried about theft? are they easy to install/remove? my new cargo bike/kid hauler is on the way to me and i am thinking about adding pogies to it to make using the bike all winter that much easier.

thanks for the advise!

when i see an adult on a bicycle, i do not despair for the future of the human race.
- h.g. wells

I swung by MEC to pick up a new set of Nanu gloves and see the new pogies. I was suitably unimpressed. They are both thin and floppy, which means when you take your hand out, you'll have to fiddle with the opening to get it back in. This does not bode well for signalling lane changes and turns. Also, they are not going to cut it when things get lower than -15C.

On a related note, the MEC Nanu gloves have gotten thinner! I bought my last pair about three years ago, and they are starting to give up the ghost, with holes in the palm and such. The new version has significantly lighter insulation and less material on the palm side. I could actually feel a bit of chill in the thumb on the ride in today, and it was above 0C! They may be going back for a refund...

As I haven't cycled in cold temperatures yet (only down to a few degrees below freezing in the dark), I'm planning to see how things progress.

The good news for me is that my hands tend to stay pretty warm as long as there isn't a heat sink cooling them off. Of course on a bike my hands aren't moving around so that may make them cooler. The light full fingered gloves I've been using are good for these temperatures and the heavier ones I bought had me sweating at -5C so they should OK for somewhat cooler than that. Then, I do have a pair of ice climbing gloves I can use if I have to.

My only potential issue is with my feet as they will get cold cycling. I think my boots will be good to about -10 or so, then under that, layer with thin socks thick socks, boots and booties and I should be good to go other than I won't have any traction for walking with the booties. Ah well, we'll see.