Not knowing what you have and being able to look it up I'd say check with these guys... Not quite Washington but is New York close enough?
According to my local plumbing supply store, I need a new nibco stem for the hot and cold taps in my shower as they leak unless you over-tighten them. My local plumbing store cannot locate stems for me (I live in Vancouver Canada). Thus, I was wondering if there was an online dealer or a dealer in Washington that could supply me with these stems.
Well, it's closer than Florida would be.
It is a bit of a stretch although you have the "Big Apple" and we have the "Best Apples". Maybe that will do it.