Here ye be:
https://www.youtube.com/watch?v=RBU0ilZLQvI
Sounds like a BBC type studio recording to me (who played bongos, Spencer?), maybe with live vocals for the show. I think this dates from Detroit 1969 because there is another version with an interview attached. Anyway, cool to hear the separation.
https://www.youtube.com/watch?v=Oej7l9KCHIA