http://www.kayakoutfitting.com/foam/neo.html
I bought a 1/8" thick, 12" X 12" sheet of this stuff and I'm very happy with it. It feels exactly like the stuff they put on the bottom of MXR pedals. It will not slip at all. I polished my coffee table with Pledge, put the pedal on the table with the foam on it, and it would barely budge at all when I tried to move the pedal sideways. This foam is for kayaks so I'm certain that it's pretty damn durable as well. Just measure, cut, peel, and stick and you're done. Thanks to AllenM for providing me with the link to this stuff