Linlai E 6sn7 tubes

I have the Shuguang Treasure 6SN7s on my Don Sachs preamp. Don says in his website that these simply walk away from the holy grail NOS tubes. That's quite a statement.

Obviously this is not the case with all NOS tubes...as a lot of the culture that made these tubes is gone forever.

My main issue is you can no longer get the Treasure variant of this tube from Shuguang (luckily I bought an extra set). You can no longer by the WE version anymore either. Psvane are hard to come by too. Now we have the Linlai.

What is up with the availability of new production tubes from the east? Not a good sign. Make a good product and keep improving it and keep making it.

The Shunguang facility burned down. There are no more WE6SN7 being manufactured. There are some vendors on Ebay selling these tubes, however there are warnings from tube enthusiasts that these are rejects by Shunguang that do not meet spec. 

I’ve heard the same thing @lowrider57. If you do a google search for the we 6sn7,you’ll find some for sale. STAY AWAY 

Any opinions on the importance of Grant Fidelity's "top 10% Ultra Low Noise" rated tube designation as opposed to buying directly from China? I need only one tube for my Dehavilland preamp, went to the Linlai website and they were only selling them in pairs. In a Senior Moment I forgot about Grant Fidelity as a possible source and ordered the single tube from a Chinese distributor on Ebay who has an excellent rating. By the time I remembered Grant Fidelity as a possible source (and they do sell them as singles) it was too late to cancel. So, am I forever doomed to neurotically suffer from those incessant ruminations that my tube will not be performing up to its potential, or is this tube grading mostly a marketing ploy?

@weebeesdad , did the Chinese vendor list them as Grant Fidelity "top 10% Ultra Low Noise?" Does the tube have PVT stamped on the glass?

My take after reading the GF website is the Ultra Low Noise is a replacement for their previously offered tube, not just tighter specs on an existing tube. They mention a different tube structure.