Ian, I know this is a Salsoul thread, you mentioned tracks in different format, here's a demo LP I have had since 1977 and never seen another. I do have few of them on 12" as well.
Side 1
Going back to my roots, Lamont Dozier
Belfast, Boney M
I believe in music, Mass Production
Free Spirit, Dennis Coffey
Cerrones Paradise, Cerrone
Sure can't go to the moon, CJ & Co,
Side 2
Love for sale, Boney M
Devils Gun, CJ & Co, (Brilliant track)
Wings of fire, Dennis Coffey
The world is a ghetto, George Benson
I feel like I've been livin, Trammps