I’ve never seen or herd of such an animal. I know that the original prototype cars weren’t white. Two reds and a black if I recall correctly? So I’d guess it’s possible that a white with gray is quite possible.
I’m certain someone here will clarify including my recollection of the promo cars.
Supposedly it was swapped out at the dealer. The story is that the lady who bought the TTA didn't like the tan and the dealer swapped it with a grey interior upon selling it to her. That's what I heard
Sounds reasonable to me. I remember back around 92 a friend of mine offering to sell me his t-top cloth car. It was a very good price the main reason I didn’t buy it was because I wanted a leather interior t-top car. Should have bought it.
I think most enthusiasts are purest when it comes to limited vehicles. That said there are probably others out there that would prefer the grey trim. Like the first generation muscle cars having a documented dealer installation is very except-able. I don’t think it will enhance the value, but I don’t think it will hurt, Just need the right buyer. People do like to own something that no one else has.