Perhaps there simply was more than one girl with that name modelling at the time? In our database are many naked scenes with Janet Agren.
The movie was filmed in 1979.
Janet Agren in naked episode from Eaten Alive which was whipped out in 1980.
A quick read through car phone article at Wikipedia, gives me an impression that that was still bordering a science fiction back then.
She then leaves for the jungle joined by cannibal film regular Robert Kerman playing Mark Butler , where they meet up with the standard Cannibal tribe and a Jim Jones like cult leader.
We can observe romp episode with her.
Still, I included a scene with Claudine from the movie in the clip I made.
The girl received an education at the Drama School.