Music dev Chernabogue has several of the SSF2 tracks he arranged available for download in four albums. The Master Hand theme is in Volume 3 and
can be downloaded at his Bandcamp profile.
The music that played on Shadow Moses actually
wasn't an arrangement; it was taken straight from Metal Gear Solid 1. It wasn't in any of the future MGS games or Brawl because of some ugly copyright dispute, but that's not really something our devs have to worry about.