I'm currently a solid state guy but just a few minutes ago when looking for a used wind trainer for my bike on facebook I happened to stumble upon this post. Not knowing any better I thought it might be useful to someone on the analog side of listening. The ad is for sale thousands of tv and radio tubes. I don't know if it has any relevance but if it does someone could be very happy I posted this. https://www.facebook.com/marketplace/item/2528134004143521
jjss49 if you are using facebook you might want to go to their "marketplace" and run a search I bet there are ads like this in your area. Actually, there were a few like this when I looked a bit deeper.