I had an idea to turn NFL billiard balls into shift knobs, a Seahawks for me and a Raiders for my friend up in Portland, OR. I found someone a few months ago to drill the ball, and insert a threaded piece with the correct thread size. Bruce Roosa, owner of www.koolknobs.com . Initially I used the washer/nut method to hold the boot up under the knob. After working with Bruce he designed an adapter that hold the boot up, but not flush with the knob. I am very happy with the results. Here are a few pic's after the adapter. Now if my friend gets off his lazy *** and takes pic's of the sweet looking Raiders knob I had made for him, I would be even happier. His is a marbled silver with the black and white Raiders shield.
$25.00 for the ball on ebay, $25.00 to have it threaded, adapter was free since I helped design it. I figure $60.00 for a one of a kind knob.
I finally drove up to Portland a took a pic myself. Not the clearest image but you can see it well enough. I think it looks great in his car. He still needs to put the adapter on.