Somewhere on this forum there is a thread about exactly this camper, with photos on a vehicle.
And to trigger your interest, here are three other car campers. Sorry the first one is a stickie but the other two are Yurpeen molded
fiberglass campers. Number 2 is a Saab Toppola that replaced the hatchback car's hatch, but was a factory-approved extra, while number 3 is a one-off on the then largest Yurpeen Ford sedan by a sports car maker, Ginetta.