There's a bootleg copy of this called "Super Metroid Sound in Action 15th Anniversary".
http://www.videogamemm.com/thehorde/...2_itemId=41969
http://blog.gamekult.com/blog/ketsue...nmade-ost.html
Not sure where he got it from, but it's obviously bootlegged. A FLAC rip has been floating around for awhile, so that's a likely source.