Presumably it needs to be slightly flexible to make up slight irregularities and to seal to stop engine fumes entering the cab. Paper probably wouldn't cut the mustard. Lot's of rubbery gasket materials on ebay. Thin cork would probably do.
I have some 2 mm neoprene sheet that you are welcome to. (Unfortunately my laser cutter won't cut it or I'd cut some for you if you sent me a .dxf of the shapes)
I have some 2 mm neoprene sheet that you are welcome to. (Unfortunately my laser cutter won't cut it or I'd cut some for you if you sent me a .dxf of the shapes)