I started using
http://www.tapplastics.com/ a few years ago for structural (glass) and cosmetic (gel coat) work on molded fiberglass campers. I found their website rich in tech tips, data sheets, etc. In my limited shopping at the time they jumped out for product selection and price. Might be worth a look. Folks with deeper experience might be able to compare and contrast various suppliers. That'd be a HUGE value add to our collective wisdom. Latent dreams to build the ultimate camper from scratch infect my brain many a night.
