Dimensions for Van's stock engine control knobs

Does anyone happen to know the dimensions of Van's standard engine control knobs? These are the ones I'm talking about. Mostly interested in knowing the diameter of each knob, so I can get the spacing between them the way I like. Also, what size hole is needed to mount them to the panel? Who manufactures them?

Ideally if I could find a 3D CAD file or 2D drawing that would be even better and answer all my questions.

Ryan,

I have the cables already if you want to come measure them. I decided to order the cables early when I started working on my panel. I ran into the same problem you are having with the mounting hole sizes.