tubes for tektron and primaluna

I'm in search of some tubes.
Have been recommended EH KT 90's for the primalunas (prologue 6 monos)which I can find.
but- for the Tektron 6j5 I am looking for Brimar ST shape grey glass 6J5's which I am finding very difficult to locate.
Any other thoughts or good contacts.
I listen to mostly jazz, funky soul, vocals and classical (also some pop/rock from time to time)
I'm also watching ebay with no luck so far.

I'm a new PrimaLuna Five owner. There are some PL owners on the Steve Hoffman Forum that gave me some good tips on tubes. Try changing the 12AX7, 12AU7 before changing the output tubes.
thanks scramman!