I have a EZGO golf cart with a 3PG engine that has a fuel pump issue. I've had my engine out for a few weeks for various repairs. Before putting everything back in the chassis, I'm removing the electric fuel pump in favor of going back with the type pump it came with which mounts onto the crankcase. The new pump came with the o-ring already in place but no insulator gasket or plastic spacer. Since the PO had made the switch to an electric pump, I don't even know how it's supposed to look like with the factory pump installed. Nobody seems to carry the insulator spacer, just the gasket. Is this something I could fab myself out of a piece od sheet plastic? If so, how thick should the spacer be and would it need to be the same shape as the insulator gasket and with the 3 holes in it? My cart is a 1990 with the 3pg Robin engine...it has not been modified except eliminating the oil pump system in favor of pre-mixing and the E pump which is fixing to get undone.