My 6922 Tubes Are Too Bright!

I haven't rolled a 6DJ8/equivalent in a while, but found the Mullard to be too warm and smooth, and favored a Telefunken in the particular phono stage I was using at the time. But, the Mullard might be the ticket for you--there are various primers on the general characteristics of the different brands, recognizing that the 'branding' was not always a reflection of who made the tube or where. I do recommend that you rely on a trusted vendor-- too many questionable tubes being offered on the Net. Perhaps some are bargains if you know what to look for but, even having used tubes as long as I have- since the early '70s, I prefer to deal with trusted sources.

My comment about the Mullards, earlier in this thread, concerned an older tube. I have no experience with the current tube offered under the brand, and only suggested the Mullard because it sounded very warm-- too warm to my ears- in a Manley Steelhead I owned some time ago. 
The risk of counterfeits is great for sought-after tubes. And even if not bogus, there was a lot of cross factory manufacture back in the day. I bought some tubes that were branded on the glass as Made in Great Britain, but turned out they were manufactured by another company (forget which one) in the U.S. (not a 6922, it was a tube for my Allnic phono-- E810F).