I am looking for this soundtrack in a good quality! because the soundtracks of this game are in a very bad quality! T.T
thanks for your atention!

Nothing?

The gsf version(ripped straight from the game's data) is available over here:
http://www.caitsith2.net/gsf/index.php?sortby=updatedd
You'll need the plugin also on that page to be able to play it, though...