Here in the southeast, especially in the mountains, it's not unusual to find a 39 or 40 with virtually no rust. I think there's a couple of reasons for this. First is that all 39's or 40's always had value; first as cars, then as 'shiners, hot rods, or race cars, and finally as antiques. Even in the 60's I rarely saw a 39 or 40 coupe that wasn't covered by at least a roof, as were most tudors. The second and foremost reason was the ol' Henry used some really good steel. I've owned three 39-40 tudors. (I never had enough money for a coupe and still don't.) None of them even had the tool well rusted out. The only rust I found on the one I have now was in the drip rail where pine needles had gathered moisture for years and right under the driver's feet. It was about a day's labor to fix it all. Enough money and a little time will yield you a good coupe in Tennesee, Virginia, or any of the Appalachian states.
That said, I welcome all the reproduction bodies. They're great high end street rod material. Good on Dennis Carpenter.