How do I get "Chinese"/"Russian"/etc Mesa 12AX7s?

[canyongargon]

Hey all. Say I wanted to keep my Recto stock and retube it with all Mesa preamp tubes. How would I get Mesa preamp tubes specifically sourced and silkscreened as "chinese" as came stock in V3 and V4, to satisfy Mesa's recommendation for Chinese tubes in those locations? Mesa's website only has a single, non-discriminant order page for Mesa 12AX7s.

Or, would I be better off not worrying about it and just retubing with non-Mesa preamp tubes while hanging on to the stock Mesa ones to put back in the event my amp needs service?

 

[crane]

I don't think Mesa will void your warranty for the use of other brand's preamp tubes (but not for powertubes). Preamp tubes are self-biased, and as long as you put the same tube type in the socket it can't harm anything.