Lessee…

If they have newsgroup servers they're probably not holding
those back. Search for groups that have MP3 in their names.

Shareaza has a network of their own, and Cox might not be
blocking it.

BitTorrent might be blocked, but it can be fast when it does
work. Azureus is the best client for that.

Blocks on any type of P2P may be temporary, some ISPs
move them around every couple of weeks to places with the
most traffic. Keep trying all of them because they almost
never block them all at the same time.