So I stumbled across this thread while looking up for info on VGMix, and think it is really cool you guys (or whoever) has an archive for VGMix Volume 2. I have a bunch of stuff, though it's kind of hard for me to remember what I downloaded from OCRemix and what I downloaded from VGMix.
Anyway, I think I at least have a song by Bladiator you are missing. It is called 'Chopinesque Kirby', and that one I for sure know came from VGMix. I can send it to you if you want.