The shell is an extremely close match for the
Trails West Campster. The Campsters a had radius corner
windows. But all the other details are the same including the size of the pop up roof, the wheel wells, how the body is contoured, etc. I suspect someone was busy cloning one of these either from an existing shell or purchased their shells from the same
fiberglass fabricating company.
I know from an article I read that the
Trails West Campster company bought the shells from a
fiberglass fabrication company. So that seems the likely answer, both companies purchased them from the same source. Or at least purchased molds from the same source.