I've read that horse mats cut into strips make great snow squeegies.
The horse mat is what I've been reading a bunch about. Might have to give it a try. Our local Tractor Supply has them for $5 off right now.
Artillian is now offering a rubber edge for a great price, as well as side wings: 54 Plow Products
From my understanding, the horse mat is like 3/4" thick. So if you don't make it too long, it can still be pretty stiff. But flexible enough to act like a squeege. It's better for asphalt and concrete driveways I think. When I do mine, I might use wing nuts on the bolts so I can take it off quicker if I want to use just the wear bar if I have ice.