yellow legos are a pretty close color match. or find someone to send you some chunks of a junk body. a bunch of those in a gallon can with some acetone will make a nice goo. I make a really thin goo and use it like fiberglass resin. soften up the base material by laying an acetone soaked rag on it, remove the rag and brush on some goo, then add layers of fiberglass cloth and more goo. goo will keep well in the can with a tight lid. if you need to thin it add acetone, if you need it thicker just leave the lid off and let some acetone evaporate off