Work in progress
Been bothered by my rocker switches. They are tiny, and somewhat painful to switch, especially when used often, like in my sim rig.
These are made for the small ones, where the shaft is approx 10mm long, diameter of 2mm at the bottom and 3mm on top.
Just made these in CAD and haven't tried them yet myself.
Will come with a updated version if this one doesn't work.

Update 1: Have made a new model. I had it all wrong in the first layout when printing it. Now hopefully I've got it right. 
Also I did a split of the model so it became 2 parts that will have to be glued together.
Have no idea if this will work. But as long as I can learn by my mistakes, I'm happy. :)