Fast food style auto parts houses, its a shame they.havent adoped burger kings old slogan from the seventies (have it your way at burger king)
I have a parts guy i work with at autozone. He is redoing a 72 cuda, and is an exellent parts guy. He knows my car is a hodge podge of different year parts, never asks,.just gets me what i ask for, the parts never come back lol.
Ya just gotta find a good one and stick with em.