Russian Tube Preamp, No Return, Here I go again

Why do you wish for 12AU, T, or X7s?
6SN7s and 12AU7s don't have sufficient gain for a phono input tube but could be used elsewhere in circuit, I suppose. The Russian triodes tend to be re-makes of older very high transconductance triodes, like 5687 and 6922, etc.  Not a bad thing, IMO. I don't think tube replacement is going to be a big problem for Elliot.

That Russian seller has 100% positive feedback on ebay (and buyer fully protected by paypal), but some strange posters here still talking about scammers from Russia.

Regarding shipping from Russia to USA I will give you one example, my own parcel has been shipped on FEB 2, 2021 and in 10 days it was in NY,USA. Look at usps tracking.

This is why my advise to the OP is to ask that seller for EMS shipping!

If he will ship with cheaper registered mail then your order can be in transit for 1-2 month.

P.S. Just like in the topic about new “Russian cartridges” I want to admit that no single part of this “handmade” tube amp was made in Russia, except for the tubes. So it’s correct to say that it was only assembled in Russia, but all parts are import parts (not Russian). Except Chinese parts inside this amp. In my opinion it’s a cheap looking amp, like any DiY projects. 

Hope it works out. In my experience it's the customs process (leaving Russia and then clearing USA ) that can take quite a bit of time.
@chakster  Good point about cheap parts. It is a given nowadays, however, that most electronic parts in gear from all countries have majority origin in China sadly, yet some are better than others and implementation is key.

@chakster by 'new cartridges' from Russia I believe you are referring to Sensitive Sound. I wish you would desist in making assertions about Sensitive Sound based on your assumptions. They are misleading...

There are NO delay on custom check on export from Russia, never. It takes a few minutes, just scan of the parcel, nothing else.
Import duties are important, not export. So when US custom inspect imported parcel there can be a delay, but only for 3-7 days.

Before covid delivery from Russia took only 7-14 days worldwide with the cheapest registered mail. After covid same service will take 2-3 month and it’s all over the world with all international postal service. 
EMS (Express Mail Service) from Russia before covid was so quick, normally 3-5 days worldwide, now up to 1 month. 

Good point about cheap parts. It is a given nowadays, however, that most electronic parts in gear from all countries have majority origin in China sadly, yet some are better than others and implementation is key.

No one in Japan will use Chinese parts in their tube amps design. I got Japanese amp myself (Yamamoto A-08s). 
But I’ve seen clones of everything in Russia, they steal design of phono stages, amps, whatever. It’s a Russian tradition since the Soviet days, original designers never get their royalties. Same happened with foreign musicians who’s records bootleged in USSR by local pressing plant and sold in million copies.