5AR4/GZ34 Rectifier Tubes

Is anyone currently making a tube of this type that rivals the performance of the best NOS Mullard tubes? I'm surprised that Sophia, Psvane and others appear not to have offered this tube. Suggestions?
Wig and Goose, some good info!

Goose, I agree on the progress with new production tubes. With the advances in technology over the last half century, plus the fact that people like us are willing to pay high prices for quality tubes, you have to think that eventually we will see tubes that will beat the best nos tubes out there. Perhaps some at reasonable prices like the Gold Lions.

Wig thanks for the heads up on the PSVanes. I've got 2 sets of sophias, so I'm not included to run expensive experiments just yet. Thanks for sharing your experience with the PS 9 upgrade. I will shoot Dan an email and see what the cost is.
Wig...ditto on the advise regarding the power supply upgrade, I will also check in with Dan.
I am really curious about the Genalex rectifier tube. I really like the 12AX7's of theirs. Retired all my old 12AX7. Very happy that this might be the tube era?