steve? if you have a local boatbuilder , or marina nearby , I'd call them and ask . they might have the answer, and if not , might be able to refer you to someone who does . or you can look around for someone with a boat at a marina and ask them.
hope this helps , I know it's not a lot of info , but that's what i'd do
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix yachts.