I'm not sure, but I suspect you are looking to build some higher appearance quality bumpers, so this article may not be what you are looking for. www.midwestattachment.com/hood shows how do fiberglass reproductions by doing a splash over on existing parts. Great for race only,lesser detailed vehicles.Much less expensive, and time consuming as it doesn't require that detailed primary mold. My son and I built a hood (pin on) for our Lancer drag car,with a snorkel scoop. Very pleased with the way it came out.For those of you , like us, with nothing readily available or economicaly feasible, this is a viable option.We have to use the coins where they are best spent or our project wont make it.Hope this helps some of you