This is a set of heavy modifications to the Parkzone Ka8 Canopy that allow you to mount 2 'action cameras' back-to-back and still use the stock windscreen.
Please note, this is a very invasive modification and I don't recommend it unless you have a spare canopy sitting around.
You need one of each main piece, along with some 4-40 bolts, nuts, and washers, and suitable 1/4-20 screws to mount your camera. I found my 1/4-20's at a local hardware store, although you may have to order yours.
I had to do some trimming on the frame, which you can see in the images. I underestimated how much the lens portion of the body would stick out during the install. A pair of wire cutters was enough to make some clearance.
That said, the videos from the flight were pretty amazing, even though the cameras added a whole lot of extra weight to the plane.