Does anyone know if there is fiberglass bumpers for the 73-74 model? If so where can i find them?

and since I dont think there are, what all needs to be done to swap a 72 bumper onto a 73? I would like to switch to fiberglass to reduce weight and I think the swap is my only option.

nevermind i found it, a great place about 2 hrs from my house, they even have the hatch in fiberglass. http://www.glasstek.com/