There is one thing you can do if you have access to a Mac. The MacOS X version of Cave Story (and any other MacOS X program for that matter) is actually a UNIX directory with a ".app" extension. By looking through that in the Terminal, you can find the data files - including the Orgs - and copy them elsewhere.
By the way, I would've already put them on the uploader, but I figured that they were deliberately hidden from players. It wouldn't be acceptable to provide the soundtrack in an editable form without the creator's permission, would it?