Popular sample from an old cowboy p*rno

Hello forum users, i am here to ask if anybody would know where to start looking for an old p*rno that served as the background sample off the track fazers from take me to your leader by king geedorah AKA MF DOOM. The information i have so far is that it is from the late 70s early 80s about a cowboy and was first found on vhs. As a lost media and MFDOOM fan i would be really happy if we found this sample

Links:
Interview about the sample: m.youtube.com/watch?v=qdw-C5lKU3g

Original song: m.youtube.com/watch?v=jRn9BRo4Igw

Original “special herbs” beat: m.youtube.com/watch?v=iaGxEky7G1g