You might try these guys.
Flounder Pounder Marine Surplus;
http://www.fpmarine.com/
Russo Marine Sea Ray, Bill Brownlow, 617-288-1000/parts or
bbrownlow@russomarine.com
Prince William Marine
12849 Gordon Blvd.
Woodbridge, VA 22192
800-772-3240
EBAY or Craigslist
Hope this helps and good luck.