That's a tall order.
For 6922s I use a Mullard mil spec tube which is distinctly un-Mullard like. It is not warm at all but rather like German tubes, they have a unique designation E88CC-01. It is called CV2943 note these are different than the CV2942. It is occasionally for sale at Upscale. I would call Mr. Deal and see what he can do. OTOH The Amperex are darned good so there is no need to run out and buy expensive NOS tubes IMHO. The CV 2943s cost me dearly the last time I got them. (Tango Tubes in Sweden)
If you have KT-88s in there, that are the Genalex reissues, that is as good as it gets, outside possibly of the ever rare NOS Tung Sols and such. Therefore leave them in or get them, if you don't have them yet.
The rectifier is something I defer to others who use them more than I do.
The 6SN7GT is not an "output tube" as a rule. They are preamp tubes used initially as vertical hold tubes in early TVs, but had been used since they were introduced in 1939 for a wide number of applications due to its inherent linearity. I like them for preamps, as does Cary. The GT is the earliest incarnation, which provides for the least voltage on the plates. There are a number of resources to turn to- if you can find Bent Jesse's tube site, that might help you. He has a lengthy description of the various 6SN7s because he sells them. I have no affiliation or financial interest in his business.
For 6922s I use a Mullard mil spec tube which is distinctly un-Mullard like. It is not warm at all but rather like German tubes, they have a unique designation E88CC-01. It is called CV2943 note these are different than the CV2942. It is occasionally for sale at Upscale. I would call Mr. Deal and see what he can do. OTOH The Amperex are darned good so there is no need to run out and buy expensive NOS tubes IMHO. The CV 2943s cost me dearly the last time I got them. (Tango Tubes in Sweden)
If you have KT-88s in there, that are the Genalex reissues, that is as good as it gets, outside possibly of the ever rare NOS Tung Sols and such. Therefore leave them in or get them, if you don't have them yet.
The rectifier is something I defer to others who use them more than I do.
The 6SN7GT is not an "output tube" as a rule. They are preamp tubes used initially as vertical hold tubes in early TVs, but had been used since they were introduced in 1939 for a wide number of applications due to its inherent linearity. I like them for preamps, as does Cary. The GT is the earliest incarnation, which provides for the least voltage on the plates. There are a number of resources to turn to- if you can find Bent Jesse's tube site, that might help you. He has a lengthy description of the various 6SN7s because he sells them. I have no affiliation or financial interest in his business.