Frampton Comes Alive
Released on DVD-A and SACD by Universal years ago. Not cheap these days, and not a particularly great surround mix by any means, but it does exist.
The Guess Who live at the Paramount
A number of cuts from this album are on the Best Of The Guess Who Vol. II quad mix. Very good mixes- on "Running Back To Saskatoon" the harmony vocal is isolated in the rears. Some have speculated that the whole album was likely mixed to quad and not released. Ditto with So Long Bannatyne.