Wow, more to look at!
Trapeze - I'm sure I have, need to find...
"Trapeze -- Midnight Flyer" - This doesn't exist. Trapeze - Medusa exists and so does a band named Midnight Flyer (who I don't have), but nothing together that I found in Discogs.
Wally - Nope (*adds to list*)
Byzantium - Got "Live & Studio" & "Seasons Changing"
Unicorn - Don't have any artist named Unicorn and am not sure which one is being referred to.
String Driven Thing - Got eight albums
Edgar Broughton Band - Got a bunch, close to a couple of dozen.
Michael Stanley Band - Nope, don't have any - will check out
Gypsy - Sorry, but this one I do have!
Sheesh, I'm going to have one serious list to go through!