Heck---it won't be long and you will be seeing the blanks for sale right here on IAP---- in 6 months you will be able to buy them from just about any pen kit vendor,if China can find enough parts.
I can see your point Gary, but why would the Chinese or anyone else wanting to make these type watches, have to use real watch parts...!!! I have been thinking about this for some time and myself with out all the computer hight techs gear, I have programs that I could easily create a normal print in a piece of paper, glue it to the tube and cast it in clear resin. Done right it would be difficult to tell the difference, and if this wasn't enough, the same design pattern created in 3D printed in special clear paper, then glued to the painted tube would make it hard to differentiate from real clock pieces in it...!
I'm surprised why one of the many computer gurus here in IAP haven though of that and done some for as all to see, unless someone tough of it and has been very quite about it, hoping that no one would mention such option before the idea is copyrighted. The Chinese would give a damn if is or not and I reckon, if they are going to mass produce clock parts pens, this is how they will do it...!
Cheers
George