Mystic blue car was sold. I actually wanted and tried to back out of sale (when I initially saw how much work this car needed) but didn't want to re-neg on the buyer.
I was very resourceful in obtaining a local donor car with the natural brown interior. The sand beige interior was deeply cleaned and reconditioned (rear seats replaced) and reinstalled into said donor car. Ended up being uber expensive and many more hours than I would have liked to have spent. But in the end, the Alpine White is now properly mated with Natural Brown!
