Check this out. http://forum.watmm.com/index.php?showtopic=34248
This guy found where the outro voices in Chromakey Dreamcoat are from. Also one of the picture in the artwork for The Campfire Headphase is form the same film source.
See in the following link, around 10:00 into the film, for both the pic for the artwork and the sound clip sampled. http://www.archive.org/details/social_seminar_tom
Great film too.