I was flabbergasted to discover that the links to mp3s at the archived Astrobox.org website are still active. You can get all of the remixes by me, CrappleJunkTown, Surasshu, AEUG, and Kuno.
If you haven't heard Kuno's mix of "Roman ~My Dear Boy~" you have to go check it out. Probably my favorite MM remix ever.
Also highly recommended is Surasshu's "Shiawase Desu Ka"