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.