Thanks for the replies.
Looks like there might be an upgrade on the way. Could be the same source but the taper says that he has never circulated his recordings. Only heard previously by him and his wife. link
Click on the list in the first post.
Well if a new source does turn up on dime chances are it'll be a good if not better. He's also got the support slot by Mott The Hoople. An ironic reversal there in the space on a year.