Before I'd jump into the manufacturing of clock parts, you will have to manufacture enough parts as it is for old clocks without trying to re-invent the wheel with parts which may still be available for the clock and watch man. Have you checked some of the different wholesale clock parts supply houses yet? Merritt's in PA would be a good spot to start, they carry a healthy inventory of small parts and pins and tools for watch and clock repair. Google "Merritt's" in Douglasville, PA if memory serves.
I am trying to kick back on my clock work in favor of searching for my "golden years", someone told me I might find them here in Florida. ........ This is my 17th year down here of searching and so far, only brass monkeys .... no golden years.