Where did you get your adapter to connect the kdrill to a powerhead?

I realize this is a very old thread, but I saw this setup (kdrill+powerhead) on a video for the first time last night and it was intriguing. Castle-Rock-Clown, now that you have had this set up for some time, are you still liking it? Also, any specifics you can provide on the best way to set this up myself? I like the functionality of having a powerhead/drill option as I want…..