Hmmm... I might be OK. Looking through my collection I'm finding those listed below. It's just that I want to get the most of the system during this test to make the decision about cabling, so I don't want to mess around....
FROM VINTAGE TUBE SERVICES:
Amperex (Holland) 6DJ8
Matsushita 6DJ8 (1965, made in Japan with Mullard tooling)
OTHERS:
Electroharmonix 6922 (recommended by VAC)
Tungsram 6922 (from Upscale Audio)
Amperex Orange Globe 6Dj8
HP Amperex Bugle Boy (Holland)
And some other inexpensive tubes....
STILL LOOKING FOR WHAT WILL DO THE BEST JOB PER MY ORIGINAL QUERY! Thanks!