Try John Birck at raretubes.com. Although he appears to have more Telefunken 6DJ8's and 6DJ8 equivalents, he may have what you are looking for. I have found his prices to be excellent and his tubes to be top notch.
Source For 6DJ8 etc
Can anyone advise a good source for the better/best 6DJ8 and its equivalents. The Amperex 7308 is attractive, but Kevin Deal will not supply anyone outside of the US - or at least that is what he has stated. Are there any other sources that might be more open-minded about their customer base?