I like that folding type of mount. Maybe some sort of u-bolt around the stock rack with a flat piece metal to mount the antenna. I think the problem is going to be how to route the coax into the X. I routed my XM antenna cable under the weather stripping at the top of the back hatch. I just made a small notch in the pinch seam that the stripping attaches to. That was very easy because the XM antenna wire is the size of 14 gauge wire. Very thin. The CB antenna coax is a different story.