I'm looking for a GC rip too.
The problem: it's too freaking hard to find.
Worse yet: nobody's bothered to reupload it or anything.
We're gonna need another Gamecube game rip of this game...
Your prayers were answered ... but on another thread.
http://forums.ffshrine.org/showpost.php?p=1186313&postcount=36
The Requests -> Chibi Robo thread attracted someone who had the soundtrack, and they uploaded to sendspace. If you are unable to get it (e.g. it has been deleted / archived), post here or on the other thread. I'll do my best to repost, since Qqqqqqwe was so kind to get us a great copy!