Well there are a lot of users that have already uploaded the complete soundtrack on sites such as megaupload, rapidshare, etc. You should search the forums a little bit more. Here is one of the multiple links where you can get it:
Oh yeah, Galbadia Hotel DOES have Diddy and Dixie Kong’s Level Ending Themes, but I SERIOUSLY DOUBT that’s what you’re looking for. Either way, I’ll post the links for you (just in case).
http://gh.ffshrine.org/soundtracks/6612
http://gh.ffshrine.org/soundtracks/6613