I recommend Anthony at http://www.tubeaudiostore.com/
He's taken over the helm at Music Reference and has select EI and Sovtek EL84M. I've used them exclusively in my RM10 for over 11 years and Never had one short or wear out.
Recommend new EL84 tubes
Hi all, I have been contacted by a good friend asking me to source 8 X EL84 for his Manley Stingray which is a parallel P-P integrated amp.
He has had the original valves for about 10 years, which I think are rebranded Sovteks or Electro Harmonix 6Pi14Pi-EB.
2 sets of matched quads will do. He is looking to improve on the originals. The amp has individual bias pots for each valve so perfect matching is not paramount.
He also needs a pair of 12AT7's. Best quality needed for this position.