@bourgwick My own story with Fred Frith was about three years ago, when he was asking about a tape from a live gig by his Skeleton Crew band. I happened to have a decent flac copy of that (thank you, taper culture, thank you, etree and dime), so I sent it to him.
To my surprrise, it eventually came out on a double-CD compilation of live dates spanning Skeleton Crew's career: