This is a combination of a cover for the endstop for X-axis + its pulley.
It requiers my X-axis alternative endstop support you can find here:
Note: This is not very easy to mount it, but I did it on mine successfully. I don't think I will re-print a new one soon, but if I have to, I will probably make minor adjustments for it. If you make yours (FreeCad source file is provided), please share them with the community!
If you prefer to separate those covers, you can use:
( This last one can be used for other endstop. )