Any experience with Tube rolling 6922 for Conrad Johnson preamp?

Try these, great sounding tubes.
https://www.upscaleaudio.com/products/matsushita-national-pcc88-7dj8?variant=21830008197

The Gold Lion 6922 is a nice tube...  it is the only tube to last long in my Classic 2 SE.   I went through a few EH that were from CJ and went noisy soon.  I have a EH in there now because i was trying to pinpoint a low level hiss and it sounds good and is dead quiet, but for how long?   I will pick up another GL soon as it seems to last and sounds good.

c-j preamps used to be really hard on tubes. They had 29 dbs of gain which required that the tubes be driven hard. Driving the tubes hard makes them go noisy quickly. I see the ET 7 has 25 dbs of gain which is better but still probably not easy on the tube.

I suggest you talk to Kevin Deal at Upscale Audio. He will tell you which tubes can handle the punishment your pre dishes out.

Kevin is a controversial guy, some like him, others don't. I hope we don’t have that debate again. You will be clear about what he thinks after you talk to him. You can decide for yourself whether you want to do business with him. One 6922 won’t be big money by Audiogon standards, so I say give him a try.

I have an email into Upscale.  I have purchased mullards NOS 12au7s for an amp based upon their recommendation and was very happy.  curious if he recommends the matsushita/national that dill suggested above.

AI second that. I haven`t tried the ET series preamps, but the ET 250 S has 2 driver 6922/6DJ8/Ecc 88 tubes. They wear out after about 1000 hours. 
That said, the best sound I have had was with a pair of Mullard Ecc 88s.