DJ, I stumbled across
this vendor offering a reproduction
main regulator crank shaft that lists for 1941-46 Chevy trucks. They also offer a
regulator tape sprocket (with drive gear) . The main page doesn't specify what vehicle application, but the pictures page does mention 1936-47 Dodge Truck. A close look at the detail pictures though compared to the disassembled unit in the tech tip (screenshot below) appear to make it look like a dead wringer.
Perhaps at least worth a phone call to see if the tape sprocket would work in your application. These aren't low dollar items, but perhaps the cost is less than finding a person capable of reproducing them that must start from scratch??? Would be interested to hear what you find out from them if you do check them out.
