I'm certain you've already called the
chandlery at Schooner Creek and all the other yards around. If you know the specifics there are lots of bearing shops that may also handle it. Specialty
hardware stores sometimes have such things in stock in stainless or
aluminum. I would imagine its for your masthead fitting or a boom end?
You might even call
Catalina to see if they might know a rigger in
Portland that might that may have some extra
parts and pieces.
Sorry I can't be of specific help but I've had really good luck with Maquire Bearing for such things.