Alternatives to Psvane KT-88's ?

 For the third retubing of my VAC Phil 300.1, I returned to the once reliable Psvane power (CV-181)  and output (KT-88) tubes. Sadly, it seems that  something has changed in their production specs. My guess is that their KT-88's now operate with higher plate voltage, making biasing a real challenge. Has anyone out here experienced similar difficulties ? What I'm listening to now is more mid-fi than the magic that had me hooked me for years. Can you suggest alternatives that can continue bring out the best of my Shindo pre-amp, Wilson Sophia 3's, and Purist cables ? I thank you for your input; the virtual beauty that used to enliven the space between, behind, above and outside my speakers is gone, leaving me with a similar vacancy.