I want to swap out my stock shift knob with the Kona one to match my Iron Man theme, but I have the MD version which doesn't have a boot around the knob... I'd like to keep it that way, so any idea how to secure the new knob in the MD? The diameter of my new knob is larger so I would need some kind of stuffing, and now I also need some kind of securing mechanism like the U-clip that was on the stock knob. I have an idea to use some kind of rubber covering in place of the chrome one, but not sure what that would be called, so I'm not sure where to find it. Any one with ideas and links?