Is there a fully balanced 6sn7 preamp?

Can anyone help me to find a fully balanced preamp or linestage that uses 6sn7 tubes? I can only think of the Athma-sphere mp-3.
Interesting question. I'm using a Blue Circle BC21 which uses two 6SN7s, but this is in unbalanced configuration.

What amp were you thinking of mating it to?
The Atma-Sphere MP-1 is also a balanced unit that uses 6SN7 tubes for the linestage.

If you are considering the Atma-Sphere MP-3, there is a used unit on eBay right now.

As far as amps go, I'm not sure yet. I just like the sound of the 6sn7, and I'd like to hear what it could do in a fully balanced configuration.

Do you prefer the bc 21 with 6sn7s to the 6299 equipped bc 21.1, or are you thinking about upgrading?
the new Cary slp -05 is balanced with 6 6sn7 !