I bought the aftermarket fender emblems for my 55.2 Napco Suburban and they are flawless. They are actual GM approved parts and look identical to the originals; they even have the part numbers on the back. It won't be long before you see someone selling them on e-bay as NOS.
They are expensive, but a lot cheaper than rechroming the originals and painting the inset with the right color paint.
Take care, George