Re-tipping a press-fitted stylus

I have a ZYX UNIverse, the original one in that series of UNIverse cartridges. It has a boron rod cantilever into which the stylus was press-fitted across the hollow boron tube. There is no visible evidence of any adhesive. I want to have it re-tipped for the main reason that by microscopic examination, there is a significant zenith error. First question is are there any re-tippers who can replace a press-fitted stylus with a new press-fitted stylus. Second question is whether than even can be done while also correcting the zenith error. (By "zenith error" I mean that the stylus is installed such that its contact surfaces are not square to the groove walls; the stylus tip is slightly twisted.) Thanks for any response. I am thinking that to get the job done the way I want, the cartridge must go back to the factory.