We had a fleet of four or five active cargo dog C47/DC3s locally up through the early 2000s. Got to fly one a bit on a late night car bumper run to St. Louis from Americus. Photos have yet to be digitized, but got quite a few, except on the trip back when I fell asleep in the cargo area floor.
The operation moved to a different airport, and I lost track of them.
Spares, manuals, etc. all available. I believe the DC3 was the first airframe which the FAA declared to have unlimited airworthiness time. (Fatigue life-wise.)
BTW, the Kittyhawk belonging to Judy Pay's mob had it's fuselage constructed 99% new in Griffin GA in the late '90s by Tom Wilson and his gang of pirates, of which I was one. Arrrgh!