Does anyone know - MPC1000 Gain & Record knob size/dimension

Hi, Would anyone be able to provide information on precise
size/dimensions/specs/diameter for the mpc 1000 Gain and Record knobs.

I'm interested in getting some custom knobs produced.

Please let me know. Thank you.

Bump

I know the width of the knobs is 2,5 cm, but what kind of type is the actual switch / sensor wheel of the actual reacting button?

would this work? http://www.conrad.de/ce/de/product/183397/Mentor-Knebel-Zeigerknopf-35361-Schwarz-Achs-Durchmesser-6-mm/0200320&ref=list