I met with the guy in PA named Larry who claimed to have been Joels supplier for fiberglass. No doubt there was a connection as he did give me a few Motion Products stickers which Joel would have include with the sale of his products when he would drop ship. The company started out as Fastglas and changed names once or twice.
Larry was really into Corvettes but didn't take such great care of himself and sold the company a few years ago to
http://www.fiberpartsconcepts.com/
Although they do offer some old peices, the majority of the items most of us find interesting are made from copies of the offerings like VFN and the sort. There are no old molds laying around, with the exception of the I guess what you would call the C3 hood with the stinger top scoop. Everything else is a copy or a modernt attempt at things. I think they even tried to make the 3 post spoiler, but the post are in the wrong spots and such.
I suspect that Joel probably had two sources for most of his stuff. I have a sneaking suspicion that those who have battled with the fit and quality of some of the old MP glass products may have struggles with Larry's work.
Don't get me wrong, they did make some nice stuff just not all of it was. Larry was really just a businessman. The actually glass guys were talented but sometimes held back. I believe one of them built the Porsche body for some of the old Lowenbrau Holberts race cars.
I'm not really sure when the relationship between Joel and Larry began, but I think it wasn't till about 1970. it stayed strong into the 1990's but don't know where it is at this point.