The only balanced ones you'll get have been cable modded to have a balanced-capable cable and connector (usually two three pin XLR connectors) I am sure TJcaustin is more than capable of modifying them, but I don't know if he's willing to.
If I had a pair, I'd gladly cable mod them and sell them to you though.
This is uncommon, but some people mod their balanced headphones in other conenctors, such as dual 1/4". It can be anything since it's always a custom job.
Best of luck though!