I think you mean Hub

firstpersonview.com has some prebuilt cabling if you're using an immersionRC tx (or one with identical plug wiring). Its kinda overpriced for what you could do with two minutes of soldering the included cabling (though if you're not comfortable with that, its ok!), but it is definitely plug and play. There is one for zenmuse => tx, and one for zenmuse => dji iosd mini => tx.

http://www.firstpersonview.com/cables/dji-phantom-upgrade-board-to-fat-shark-immersionrc-transmitter-cable http://www.firstpersonview.com/cables/phantom-2-iosd-mini-transmitter

edit: There are 3 us sellers on amazon marketplace that have the hub

http://www.amazon.com/Dji-Phantom-Fpv-Cable-Hub/dp/B00I82U7YQ