Eaten Alive! (Uncut Version) (1980)

aka's: Mangiati Vivi!/Doomed To Die/The Emerald Jungle

A young woman (Janet Agren) teams up with an adventurer (Robert Kerman) to find her missing sister (Paolo Senatore) in the jungles of New Guinea and they stumble upon a religious cult led by a deranged preacher (Ivan Rassimov) whom has located his commune in an area inhabited by cannibals. Also with Me Me Lai.