Supposedly there was an official OST released but it’s out of print.
http://www.cdjapan.co.jp/detailview.html?KEY=CFCL-1
I’ve found the Megatech Body OST (which is the OST to the PS1 game) on GH, but not the PS2 game.
If anyone has the PS2 OST, I’d appreiciate the help.
Thanks.