Custom Center Caps?

http://www.americanmuscle.com/black...AMID=black-bullitt-17x8-9498-1994-BaseFitment

Its is highly likely i will be getting these rims(or a similar style) for my 70 Dart Swinger. one thing ive thought would b a cool little touch would be to get chrome center caps engraved with the "Swinger" script on them, highlighted either in black or in body color (which will eventually be Green Go or Sublime Green). how would i go about getting caps like that? i obviously cannot just order them online