HYTONE™ Natural Rubber Latex Sheeting - The Hygenic Corp.
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 :
Cloth Inserted Neoprene - Canal Rubber
Neoprene Rubber Sheet, Rolls, Strips 1/8" (.125") Thick x 36" Wide x 50' Long Solid Rubber: Amazon.com: Industrial & Scientific