If you don't have any luck finding the clutch tool just do what I did & make one.
An M6 threaded rod/long bolt anchors into the case welded to the hinge then the fork shaped thing which presses on the clutch spring retainer also hinged to the lever which you push down against springs to remove those cool CZ 'dog bones'. I even made my own dog bones from 309 stainless welding rod, lathed down in the trusty electric drill & grinder.
You have to retrieve the dimensions by eyeballing whats there on your CZ, my removal tool aint perfect but does the job.
Here's my sketch I just did... thats all I got time for today:
