Depends on how it's listed. Generally, if they state things as being "OEM replacement," it's usually a Ford-made piece like you'd get at the dealership; if it says "reproduction" or "aftermarket," then you may as well save yourself a few bucks on shipping and just buy the exact same thing at a parts store.
FWIW, the switch I bought for the notch at Autozone looked exactly like a stocker and worked perfectly well.