Don't forget your local auto salvage yards! While they DO occasionally get RVs and travel trailers, ya never know when, so you need to check around frequently!
BTW, JACK'S Auto Salvage in N. Billerica MA still has a 1978-vintage RV with a Dodge drive train, factory AC. (it's parked WAY in the back with the vintage trucks). While most of the little stuff is gone, there's STILL a good 19-foot RV awning on it, and two (2) Coleman rooftop AC units.
Coleman stuff is hard to kill, I'm betting they still work. I partly disassembled one of the units' interior parts, mostly to see how they installed the thing. All of the parts are still there.
Plus there's the RV roof ladder to salvage, the tub/shower base, who knows what else....maybe the 30 amp shore cord?
The tool storage is nice, but where do I put the bed?