If it is a used truck it is likely not covered by a warranty. If by chance that it is, Fyda and or AB are your first calls.
If it is not covered, get the yellow pages if in Boston, and call trailer repair and or dealers.
A few would be, Great Dane, Kentucky, Wabash, ect.
Another might be Supreme Boxes. They have alot of dealers
A frame and translucent roof can be installed pretty quickly. If the framing is there and just the translucent roofing is gone, I would fix it in Boston.
Since the framing is usually rivoted on, I would be surprised if all of the framing came off.
Good luck.
Davekc
owner
21 years