Looks nice, but every shop I've ever worked at made their own blanks for ejector pins. There's are so many configurations of workpieces that it just make sense to do it this way. Some parts are thin-walled and need a pin very close to the pick-off collet diameter, other parts need to be pushed out from a surface inside a counterbore, etc.
I've made some pretty fancy ones too, with holes like that for either air or HP coolant. Many end up in the part's "job box", a few were more generic and could go into the big drawer of miscellaneous ejectors.