Best M8080 NOS tube for CJ preamp line stage?

Dre, the original M8080's were indeed Mullard. The replacements, sent by CJ through one of their respected retail dealers, were not. That being said, the pre-amp has never sounded better. I cannot identify these tubes but they seem to be really good. BUT, if i could find some NOS Mullard or RCA, I would try those as well. Found a few dealers on line that seem to have passed through the audiokarma filter (a bunch of DIY guys mainly), and the prices are a little higher than for the new Genalex 12AX7 tubes, which run roughly 40 bucks each. Check this out and let me know what you think:

https://www.tubeworld.com/index_high.htm

Jeffrey, thanks for the offer. I sent you an email.

The origional tubes in my pre were m8080's.The second set which I purchased through cj were cv4058's.These are both mullard's but with different codes.I think the m8080's are their premium grade tube.Cj apparrently bulk purchased nos cv4058 mullard's as my research and trial's have shown this to be the best tube for the classic.Let me know what tube's you are currently using.

I just bought some old records so I'll check under the hood in the morning.

Jeffrey, on the MET-1, how did you determine which tube goes with which channel? Is it something I missed in the manual?
Thanks.