The guy sells multiple colors, the guy's seller name is sparks00033. The color I got was the gray. He will also send you a free sample so you can actually see and touch it, that's how I compared it to the other stuff.
His paper with the stuff says: Search for "SOUND FOAM ROADBED" on eBay, and indeed that brings up a bunch of his listings, in both HO and O. He also has the wide pads for under switches, I haven't trimmed those yet after placing the switches, still to come...