Amazon.com: Neoprene Rubber Sheet - 1/8 Inch Thick x 4 Inch Wide x 10 Feet Long Neoprene Rubber Strips Rolls for DIY Gaskets, Pads, Seals, Crafts, Flooring, Cushioning of Anti-Vibration, Anti-Slip :
Rubber-Cal Closed Cell Sponge Rubber Neoprene 1 in. x 39 in. x 78 in. Black Foam Rubber Sheet 02-128-1000 - The Home Depot
Black Rubber Flooring Rolls | Rollout Rubber | On Deck Sports