Howdy and Welcome to iRV2.
Glad you joined in, the first question most will have is "what type of camper do you have? It's hard to give advise if we don't know what you are dealing with. So add a bit more information make, model, year and the sort so it can be researched to see what is out there. The first thing that comes to my mind it to see if there is one out there that the roof is good and the body is shot.
Let us know..