Thanks for the response. Would not expect to find reproductions and the thought of trying to separate and successfully install new drum to hub seems like a disaster waiting to happen. Have a lead on a left side hub. Can punch out stud and hope my hub is not too damaged. Prior owner installed right hand stud for something. It's loose. Think splines are damaged.
There's the thing. You don't punch or pound out anything. The OEM studs are pressed into the hub and then swedged over the drums holes. Cut the swedge away and the drum falls off, studs and hub intact. This was common practice back in their day.
If the swedge was actually required, modern vehicles would also have drums and/or rotors swedged to there hubs.
Same for left hand threads on left side of vehicles. If the lug nuts are properly torqued they are not going to back off regardless of thread direction.
