I haven't come across anyone offering it for trade either, I will keep a look out for it, Also I'll ask some I know that have quite a few Rockpalast stuff, the only video from that show I have is Gov't Mule, And Dickie Betts,
It's one hell of a good TV show though, some good bands have appeared on there.
"BoogaBlues" my forum thats all about the "Blues".
I have a dvd copy of a concert they did in Houston in 1977 featuring Hughie, Billy Jones, Freddie Salem, Harvey Dalton Arnold and twin drummers who because of the lighting are unknown but I assume they are Monte Yoho and David Dix.
The credits for the recording are attributed to Silver Stallion Productions.
I was trying to get more info on this on Freebyrd.org, when the Rockpalast one was mentioned as being better.