The camper is a conventional wood frame model with metal siding. I would guess it was built some time between 1965 and 1980. They are simple to build, and there were literally dozens of smallish manufacturers around, most of which no longer exist - and in the time before the internet.
The good news is: this is not rocket science once you understand the basic construction principles.
There are specialized rv junkyards and many of the more exotic parts like siding are available as well.
There are also a number of people around who restore old rvs as a hobby. Maybe one of them chimes in.
It looks like a fun project and I wish you success - and a lot of fun with your little camper!
