While I applaud your 3D printing efforts, I'll offer possible alternatives:
https://flippers.com/catalog_oc/switch-actuator-p-5571.html?search=7595
https://flippers.com/catalog_oc/ratchet-and-shaft-p-5567.html?search=7548 (if you just need the shaft)
There are actually different actuators as shown at:
https://online.fliphtml5.com/vrtyz/zlqw/#p=13
so double check which one you need before you order. I suspect that the shafts are all the same.
/Mark