Telefunken 6DJ8 for my DAC

I think you're better off with Siemens 7308 gold pin.

You can price them out on ebay. Average price is $30 to $50 a piece depends on when you bid and who you buy it from. Store price is $60 and up. Please be careful that you would only buy the West Germany type with Gold pin and not some relabeled Siemens made by Sylvania.

I've tried over 50+ different 6DJ8/7308/6922 tubes
for both phono and line stage in preamps.
If that's not enough for you then I don't know what else to tell you.
Yes, I do own Telefuken 6DJ8s. If you don't mind microphonic then you can try the Telefunken 6DJ8s. It has nice soft mid range in a preamp, but lack of authority in bass and not enough spark in the high frequencies.