I just bought a 1979 Chevy Santana camper and I can't find much info on it. Are they still in business? Are camper specific parts available? A google search just comes up with some singer with the same name.
Slightly more helpful, there's a guy on vannin.com who had some scans from an old Truckin' magazine about Santana conversions. They're no longer showing up, but if you contacted the poster, you might have some luck.