I came across this interesting item this week. It's clearly labeled Mirage, Elkhart, Indiana. The chassis is an '82 GMC S15 dually, with 57K miles. The camper body is all fiberglass and there are a few fiberglass cabinets inside. The inside is raw fiberglass...no insulation or finish panels. There is no bath, but there is room for one to be added at the rear on the passenger side.
This is located in 28752/Marion, NC. The guy I asked about it said it is owned by a fellow up in Avery County (about 20 miles north), and he's asking $3000. The area code for the phone # in the photo would be 828.
Maybe the thing I liked most about this is that there is a normal door at the rear, but you can also lift the whole rear panel like a hatch back, and then you have an awning
over you when you sit on the rear step, or on chairs.
I've never heard of Mirage, but a quick Google search turns up other examples of the same body mounted on Ford Ranger and Toyota chassis.
Hope you enjoy the pictures...this would make a neat project.