I here you guys are looking for the soundtracks to these stages. If it's one thing I know how to find, it's music. The first link takes you to the site homepage. It's my #1 site for getting great bgm's! The second link takes you directly to the GGXX soundtrack. Just click the song you want. Then right click it on the following page to save it. If you left click it, it will just play on your PC. So you can hear before you download , in case it's not the song you had in mind. Enjoy the tunes. ..
Oh btw, I suggest checking out he the third link. It's the Korean Soundtrack. It's totally different, and totally awesome!!!