There were a couple tapes released a while back, but have yet to make it online (as far as I've seen), and I was hoping this somebody could give a status update on these, and when we could see them in circulation.
New London Theatre 1977 (Wardour-321): Definitely an upgrade, was released a while back but hasn't made it's way online. link
MANNHEIM 1986 NPR/NDR GERMAN PRE-FM MASTER (Wardour-353): Soundboard of Mannheim 1986 link
New Sapporo 1979 sources. I can't find a link for them, but they are listed on TheRealWizard's site link link
But Mannheim is a direct transfer of the soundboard, no? Even if the sound is worse, it's still something worth grabbing just for that alone, since all other sources are broadcasts.