Unicell, Fiberglas Van Bodies, Buffalo NY
What I was looking for above, the van bodies, its called Unicell, and its in Buffalo NY.
This is the type I like best, because it is such an improvement over what is typically used.
One huge rear hatch. Made for Ford and GM, but only GM still makes the vehicles.
https://www.unicell.com/wp-content/uploads/2017/02/Aerocell-SRW-GM_2016.Final_.pdfOf course I'd like to see them made for the double tires chassis cabs, and for other chassis cabs, and in motor home, food service, and external tool bin hatches too.