I know a lot of SyTy'ers are using Goodmark for hoods. The bumpers are part of the cladding. I thought Rockford Racecraft out of Rockford, IL used to sell fiberglass cladding. Not sure on fiberglass bumpers.
There are a couple of tonneau(Tekstyle, Checkmate,...), your best bet is to search syty.net to see what people use.
Good luck.