I've seen several similarly dated LORs (white convert at the Dream Cruise) that were within just a few hundred of mine.
That was the gentleman from the Carolinas. Cameo White w/Red deluxe interior. He also custom painted the centers of the Pontiac letters on the tail panel red so they would show up better. He gave me a biz card. Finding that will be like a finding a needle in a haystack.
I do recall that bit of info as Vikki said. It was within a hundred or so.