Re: Parallax Recalibration Service
Firstly theres no substitute for marking your own, it will be more accurate than the factory markings. The only scope up to now that tallies in with factory markings is the older Burris Signatures, which of course can be user adjusted and locked down.
Assuming you require a new set of markings, these will have to be done by yourself to your eyes and sent away for one off laser etching graduations. Going back 12 years it was well over £120 $200 ish.
Semi pro can be achieved with Letrosets(R) or similar and clear nail varnish over the top. Should last years with serious abuse.