Hey Dan,
a rare album indeed, but not that mysterious. We know who the composers are, and pics of front and back covers have surfaced yet (yep, still missing to see the labels pics and to know exactly the year).
Few label's informations are also known, and it's even listenable via a mp3 rip floating around.
Quite elusive and rare, I agree, and I also share your desire to listen to a better quality lossless rip one day...