http://www.equilter.com/cgi-bin/webc.cgi/st_search.html
http://www.overrainbow.com/cgi-bin/Store/store.cgi
These 2 sites came up with several fabrics.
edited - more:
http://www.fabricworm.com/mebyhero.html
Did you check on eBay? Go to the advanced search and check the box for ebay stores too. Good luck!