Their website is a bit challenging to navigate but they do have a very nice selection of signal tubes, octals, novals, etc., and quick responses to emails. Downside is shipping takes about the same amount of time as it does from China, so by the time they show up you've forgotten you bought 'em. However, worth a look, and if you see something you fancy, send an email to Koray Kural (email@example.com) and he'll dig up what you want. I haven't asked him his source but my guess is they found a nice stash of 2nd- and cold-war bottles and are dribbling them out.
Not on commish or payroll here, but a good deed deserves a good turn.