For anybody that works in manufacturing, you are probably familiar with e-stops and the button breaking long before the e-stop has an issue.  Here is a replacement button for a 22mm e-stop.

I made it to have the white arrows and that will need an MMU.  It only has 6 color changes so it could work manually if you happen to be close by.

I used translucent red PETG with 0.15mm layer height and 10% infill.  In reality, there is barely any infill anyway.