Clutch perch/lever

In order to get rid of the Lucas made electric controls and to "look" better with my Magura brake master cylinder I am looking for a clutch perch/lever, but I seem to remember that it has to have a "special" amount of throw to be compatible with the Commando clutch (I will install a belt drive). Any idea?
Thank you
Philippe

Clutch

I used Magura Master Cylinder etc. and on the left used an early BMW clutch lever assembly.

I had to file it out a bit, and do a few other minor alterations.

It really works well and looks good,

Jerry