You could try calling Upscale Audio or Brent Jessee (Audiotubes.com), or, for current production tubes, Jim McShane. These are just a few of the sellers who are considered good dealers who will give you good advice.
Check out their websites to determine what they have and what kind of cost you are looking at and decide what kind of sound you want and how much you're willing to spend before calling.
Sorry if you already knew all that but I couldn't tell how experienced you are from your question.
Check out their websites to determine what they have and what kind of cost you are looking at and decide what kind of sound you want and how much you're willing to spend before calling.
Sorry if you already knew all that but I couldn't tell how experienced you are from your question.