More 3D printer to the rescue

The knob to my GPS holder fell off and was lost.  I found a good looking replacement knob on Thingiverse (a web site where you can download 3D designs for printing) and made a few changes.  I added a hub and a hex shaped hole to capture a nut.

The knob fits quite well and works great.  I printed it out of black ABS and you wouldn't even know it's not original unless you looked real close.