Cog spares for freewheels went out in the 90's. what do you hope to accomplish?

There is a factory tool for production, those engage all the notches,
and I expect is part of an Automated manufacturing tool ... which is why
a part shipped around the world is still selling for less than $20..

Older Freewheels thread the cogs on. Chain Whips grab and unscrew them.
Regina , and Sun Tour and Malliard are all gone, as companies.