Rarest A-Body Option?

I've read a bunch of these posts and i see the mirrors mentioned, most of which were dual rally sport mirrors. I've seen very few that had regular dual chrome mirrors on em. Not sure of the code but maybe someone has more knowledge of real numbers. While in Carlisle i did see a factory Duster with Moulan Rouge bottom and Black painted top that was suppose to be 1 of 1. The top offer was $75000 and it didn't exchange hands.
Small Block