Found out that the frame in my pictures is made by Guru-z (
www.guru-z.com) and I asked Ka-Planes about the 12mm tail boom and it does require an additional part and they are looking into getting them. I was able to find the part, but it is coming from HK so I have to wait for it. Also the top part of the frame is designed to fit the stock bottom half of the frame. It look like it started out as an upgraded top half of the frame and then went to a full frame.