I'm not sure I know what I'm talking about, but this site:
http://www.seattlefabrics.com/neoprene.html
seems to have a large selection of neoprene. I believe the person on ebay was selling them for $24.95. Sounds like a great profit to me! Ebay also has a fabric cover:
http://tinyurl.com/2puqms
but that seems more decreative then protective.
Kathy