Daisuke Watanabe has a CD released on his character in The Prince of Tennis Musical. This album is shared here and I have obtained incisively's permission to link to it. So if anyone wants to hear George (well, his actor) from UM Mebius sing, here's the chance. As for myself, I'm going to buy this album whenever I have a chance (probably with the two Mebius Gaiden DVDs, so yes, hopefully no more hunting for raws).
Again, here is the link for the CD, courtesy of incisively.