Sound like an ad for JPW. Try Rochford supply for the fabric and glue; Assemble and build the pad for $35 ish. It's 18 oz pcv fabric...roughly $3.5 bucks for a square yard of fabric. Recycle foam from Craigs list and the pads can be done for $13-18 bucks. With the money you save, put your kids thru college.
Proclaimed Lobbyist for Whitewater