Vacuum tube suppliers

+1 Vintage Tube Services. I consistently get better sounding tubes from Andy than anywhere else. He meticulously tests, matches and cleans the tubes he sells. His knowledge of tubes, vintage equipment and practically anything audio is very impressive. As lowrider mentioned you must call him to place your order but that's always a pleasant and educational experience so I don't mind at all. 

So true rcprince,

I failed to mention in my initial post how talking to Andy has led me to tube options I didn't know existed yet worked better in the application I was using them in than what I called to order. His testing and cleaning of his tubes are second to none but it's his vast knowledge not just about how tubes work in circuitry but how they will sonically perform that I find most valuable.