Currently we have 98145 music box melodies, but if your favorite melody is not yet listed in our catalog, just go ahead and create it using online melody editor or gently ask somebody else to make it for you on melody requests page. Don't forget to vote for melodies that you like - the author will definitely appreciate that.
Sorry for late upload. I was exhausted about creating melodies after giving up several other drafts. It's quite difficult to fit songs that I love into 15 note music box... But somehow I managed to finish part 5(though its quality is quite poor) and will upload one with all parts combined soon. Let's give parts retouch later :)