Dust Cap part numbers

Does anybody have a good part number or source for front hub dust caps?
I have a pair of the Dorman ones from the local parts store #13996 that don’t seem to fit, seem slightly oversize.
Though, I admit, I also have aftermarket “Cordoba” rotors. So proper fitment might be a crapshoot.
How much of an interference fit should they be, I might have to pull the rotor off and put my calipers on the inside of the hub.