I wonder what it would take to purchase "the remains". At least for the Caballero, I would think it could be restored using hides from animals it would be OK to take hides from. I don't know about the others, baby seals, polar bears and the like, one would have to do it "faux" or maybe PETA would burn your car down.
The Show Cars are best purchased in original condition but if that's not possible, a restoration would be worthwhile to preserve a piece of KF history. I would hate to see it stay "in remains" much longer.