Warm sounding 6922 Type Tubes

FWIW, after many years I stopped chasing NOS tubes (for the most, part depending on how old old is) and when selecting 6922's with a warm tone I use JJ's. They are cheap and fairly dependable, although I usually keep a few spares. For clearer toned 6922s I usually use 6h23s or EI 6922s gold pins, the former are fairly cool, the EI's a tad warmer).

Whether on not a tube change will help when you have tinnitus might well depend on 1) the severity of your tinnitus, and 2) the frequency in which your tinnitus dwells.  A tube known for warmth might help but you won't know unless you try. I'm not familiar with the Orchard so I can't make a recommendation but if you have/can get and adaptor you might try the JJ I commented on above.