Replacement tubes for C-J

I'll second viridian's recommendation of Viva Tubes. Good prices and great folks to deal with. https://www.vivatubes.com/
My other favorite source is Jim McShane. He doesn't have a pretty web site but just send an email or give him a call. He knows more about tubes than just about anyone, does meticulous testing and is a real gentleman. http://www.mcshanedesign.net/tubes.htm

Thank you all. I've ordered new tubes. It will be interesting to see how the old boy  performs with the new tubes.