A multi spindle CNC machine would be the key to reproducing stock sets. While it is possible to do them on a pantograph the time and labour is considerable.
I stopped doing them years ago due to the time needed to produce one and the inherent possibility of a imperfection in the blank rendering a stock into a piece of firewood.
Flying Pig has taken on the challenge of reproducing Ross stocks but possibly has encountered this. Nothing like spending 10 hours and then having a chunk of wood blow out and have to start over again.