Female Headphone jack for the AT series

Does anyone know if you can buy the female port somewhere? In other words, I have a set of the Gray Ghosts for the AT on the way, would like to be able to use $150 headphones on other machines if needed. I can make a traditional 1/4 plug to come out of it and mate to it, but need something to link up with the Gray Ghosts. I've emailed Garrett to ask if I could buy the port that goes on the detector, but haven't heard back. thoughts?