I originally cropped this loop for a music-based level making contest (contestants are assigned a song, and they have to make a level using said song), but the person assigned this song never submitted a level, so I decided to post it here because why not?
http://www.mediafire.com/listen/i3aqu749wsrgwbi/Network+Adventure+Bugsite+-+Nanohana+Town.mp3
If you play the song in Windows Media Player or whatever and set it to loop, it should loop fairly accurately.