Hmmmm...now who makes billet knobs?
I've mocked this dash up in my build, but havent done any work to hide the knob bracket but will post a pic when its complete. Great write up btw, i wish i had the patience to document like that.
Toyota Land Cruiser Windshield Dash Screw Knob - Pair - Billet Aluminum
http://www.cruisercorps.com/sites/default/files/imagecache/product/_DSC8816.jpg