he is probably talking about the judge not on greensleeves and I forget the title but they did another set together on greensleeves a year or two after "rumours". both were available on vinyl and are probably still at least available on cd. both contained most or all extended mixes. edit: oh yeah it was called no contest and it contained Gregory solo, deb solo, and gi and deb combo tunes all extended.
then there was two bad superstars and two bad superstars II, I forget which label maybe burning sounds or csa, as I recall all extended mixes edit: correction all in a disco showcase style eg: vocal followed by version as separate tracks. next edit: further correction all appear to be extended tracks not showcase style:http://www.roots-archives.com/display_artwork/5652.jpg