its pretty pimp i admit, there is a rip of the demo, the track Invasion of graceamaria has the theme in it..although not as full fleddged as you might like.
THanks to Cstrife0777 for the rip!
Ace Combat 6: Fires of Liberation (Campaign Mode Demo) Rip (Ripped by "cstrife0777")
http://www.mediafire.com/?eafgj2jj1y0