Yes, they can be modded to be pretty close in appearance; I think the rear flange is still a bit shorter on the modern surrounds vs. a real 1963 one. I wonder if Graham has a modern surround to compare with the one on his '63 4001. Those two PMC basses look like they were basically a 4001CS with a reversed headstock, or visa versa. Or, more likely, based on the early 4001V63s that featured that surround shape.