Nobody should feel bad about acquiring tubes for personal use in their expensive tube gear. I honestly don't care where they came from, or who gets the money. Good grief. 

It appears that Upscale Audio has suspended tube sales from their website. I suppose you have to call and speak to a sales person. But my sense of things is that unless you have a really good story you may only be able to get only a replacement tube. 
 

TubeDepot’s website shows many tube types unavailable. Some of the more expensive tubes are available but only in very small quantities. 
 

valvesnmore as of last night, seemed to have more tubes. But certain types might be available in small quantities or unavailable. 
 

Good luck. 

Prof, I have to disagree with you, I feel anything we can do to help stop the atrocities going on in Ukraine, including bringing the Russian economy down to stop it, is the least of what we should be doing, Even if it’s only a symbolic gesture like stopping purchasing Russian vodka or buying Russian tubes.

As for the Chinese government having concentration and slave labor camps for Uighurs, I don’t feel like that’s much different than what the Nazis were doing during WW2, except they haven’t resorted to mass executions yet, far as I know anyway. I read an interview with a woman who had been released from one of the camps and then escaped to Kazakhstan,. She told of the gangs that pulled her and other women out of their cells at night on a regular basis to rape them. It was pitiable. I also listened to an interview on NPR how Chinese police have installed cameras and listening devices in Uighurs living rooms in their homes, and regularly spend overnights with Uighur families as part of their oppression of them..

That and other atrocities are nothing I want to support with dollars I use to buy things here at home. I can’t stomach turning a blind eye to that. As Americans we are fortunate enough to be free enough to stand up to pure evil, and should be doing that no matter what side of the political fence we are on.

Go to the trouble of finding Slovak tubes. It’s a small sacrifice, And In my estimation, which will sound harsh to you, you shouldn’t try to rationalize dong otherwise which sounds to me like what you are doing. The Ukranians want to be in the free world. They need every bit of help they can from everyone including us Audiogoners while they and their families are being massacred, and their homes, schools and hospitals are being blown to pieces by that paranoid despot and Hitler wanabee Putin. I don’t feel we’re doing near enough. and I feel we all need to do our part no matter how small. That’s my opinion anyway. Others may not agree and I won’t belabor it anymore in this small corner of my world,

Mike