Easy enough to replace the sideplate. Of course, that off-side will be about 1/16" thinner than the lock side, not really noticeable.I too would have preferred the serpent side plate and the checkering on the wrist would be nice.
Big thing will be finding a serpent casting with the exact distance between holes.
Good luck, will prob look nice.
As for checkering, you can do that on your own. Practice first, but it is not really difficult.