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
Sorry I can't be of specific help but I've had really good luck with Maquire Bearing for such things.