Ah ok... well but maybe we should define the whole thing
Samarium Cobalt Noiseless, adopted on mid 2000s American Deluxe models, were sold even separately as Fender Custom Shop products.
American series pickups of same period (before American Standard series) were apparently also sold separately as Custom Shop parts, so if memory serves, they were supposed to be available for both 4er and 5er basses.
So did first generation Noiseless pickups, still in use on many Custom Shop creations. Now why these generically mentioned Custom Shop pickups should ever be only for 4ers?
l'innocenza e l'intelligenza nel miracolo della Creazione.