The ZZ Top albums were released in the US on the London label, which is now part of UMG. So I don't think there will be a Quadio release of any of their albums.I seem to remember John from Rhino being excited when he found out that ZZ Top's "Tres Hombres" had been a quadraphonic album (can't seem to find that post, though). I'll vote for that as the next release.
J. D.