Balanced Y Adapters--Where to Find


The manual to the Levinson 380S pre specifically discusses the use of Balanced Y Adapters for passive biamplification. I have no clue who makes these or where to buy them. Can someone offer direction?
128x128dar
To repeat what Nsgarch said - Cardas will make them for you.

I think there were some for sale here last year, but they were very short.
http://www.btx.com/Categories.aspx?Category=af56ddd7-402e-4251-8709-f1ecaa6c695a

or

http://www.audiogear.com/Audio-Adapters-Xlr.html