J5 Quad reissue, why not Supremes Quad Reissue?

[thanxal]

I just got the recently released Japan Quad Lp mix of J5 Greatest Hits. Its great and I love the alternate mixes. But my question is why not a Diana Ross and the Supremes Greatest Hits Japan Quad re-release? I know, we can't even get Ross 78 and Reflections and here I am asking for more. I found the original Japan Quad Lp after years of searching but would certainly shell out a few bucks for a new [[and expanded?) copy.