@timmerzfl Would what you are looking even qualify for Mecum or Barrett Jackson auction? I may know of two cars that are projects but wouldn't classify them as driver. They would take a little work just to get to the Driver Status neither car is a J Code. I know you stated you would like to find a J Code Auto car but in our production numbers show there were only 658 total built in that configuration. Our registry only has 281 reported in that configuration. Most Produced colors are Candyapple Red and Lime Gold so you will usually find those two color for sale more often.
I also wanted a J-Code 302 PDB, PS, AC car and it took me serval years to find what I was looking for. However, I wouldn't get hung up on AC because I have found the original system works but it is not as efficient as the after market systems of today. Being in Florida you would be disappointed in a Factory AC car performance.