BAT VK-60 tubes


I have an older VK-60,"C" boards, with original working output tubes. Any ideas on where to get new 6C33 tubes?
A couple years ago, BAT said go to dealer. Dealer only had used tubes. Upscale Audio sent me 2 tubes, both defective, although they had supposedly been tested. Any ideas on retubing?
sharri
As stated in my earlier post, I have heard that using the ST style, large plate Mullard ECC-34 is the hot replacement for the 6SN7 in the BAT VK-60. The Mullard ECC-34 provides better dynamics, better mid-range, & more natural presence. I was just wondering if these were what you had bought. Thanks!
The re-tube is complete. This has been the most cost effective upgrade imaginable.
Highly recommended to anyone with an older VK-60 with age and a mix of tubes.
The 6C33's from BAT are expensive and can be gotten from other places for less.
Matching not important with the vk-60, so can save a bit by shopping. The tubes all come from same plant in Russia.
The 6SN7's from Upscale are HIGHLY RECOMMENDED!!!!
Jeepers...thanks. They are a great tube. And cheap. And durable. We found those in South America believe it or not. So it's been a nice deal for customers.