Best tubes for BHK Preamp that are still available

Looking for recommendations for tubes that are still available for the BHK Pre.

For NOS tubes that are “available”, I like Telefunken “Mazda” 12au7 tubes better than other NOS tubes including Telefunken itself.

For new production, the best I have tried are Apos Ray 12au7 Select tubes, followed by Gold Lion 12au7 tubes.

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Thanks so much for the info. I just ordered a pair of Apos Ray tubes. I’ll put these in my BHK Pre when the original tubes need to be replaced.

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Though I might test them to see that they work