Why make what you can buy! building a two piece mold to pull a female off the existing bumper and then another layup for the bumper its self, i don't see it being cost and time effective, unless it required to be a custom part that you cannot purchase.
After the OP finishes his bumper, he will agree with you.
I know STEFF wants other parts for his Road Runner, that are not made, so if he can learn how to make bumpers now, I'm sure a set of front fenders, and deck lid are in the future.
