I have an original from a '76 4x4 short-box stepside, still sandwiched between the Slanty & 4spd bell.....$$$ & #'s for the new-lighter unit would get accurate feedback for them....
it sounds like it could be anywhere from 350-600 really all depends on how many people are willing to commit.
with the crazy prices on the factory adapters and the weight of them vs an aluminum version I personally would love to see this happen.