Thanks Bob, I sent an e-mail to Kevin asking to have one set aside.
I bought an Dynakit ST70 on e-bay that looks pretty stock to me as the cans and caps underneath say Dyaco on them. Nice wiring work underneath too.
After reading the forum here, am thinking I should probably replace a few parts, like the Can, the 2 caps under the output transformer that go to -35 (-65? don't have schematic in front of me), and the selenium rectifier with a diode so I am not surprised at some point with major failure.
Also bought a few spare 7199s on e-bay. When I bought the amp, one channel had some hum that that I traced to the 7199. Put another one in, no hum at all now. Other tubes seem more available, so have not bought spares for them yet.
Have used it for 3-4 hours on several weekends now, sounds very nice driving a pair of JBL L3t (bought new in 1985 or so). Source is a Philips CD player (have to look at the model), headphone jack with level control going right into the amp, plenty of volume available - when wife & son are not home!
Replaced foam surround on one woofer, the other doesn't have holes in it (yet) but just a matter of time I think, will be replacing it one of these weekends.