There are no "B&W vector tubes".
There is just "tubes". I recently put a B/W TV tube in my LL. Worke like a charm.
Every tube can be rejuvenated unless it is totally dead.
B&W tubes all use the same socket. I just double checked this in the Muter rejuvenator list and that tube -is- listed there and indicating to the only B/W adapter that rejuvenator has.
So, find the B&W adapter for a BK rejuvenator and you're good to go.