Summary

I didnt have any M3x50 used in the original files with the spacer and they are not very common un 50mm.
So, I designed a new bracket, holding the limit switch / end stop and covers the belt drive. I might be doing a cover for the rest too, but imho it isnt needed for more than looks.

The limit switch PCB is fastened using 2x M3x10 and 2x M3 nuts
The bracket re-uses the stock countersunk M3x40 from the stock setup.

I printed mine in ABS using my Zortrax M200 (because other parts are printed in the same color). It sould hold up fine in PLA too.

I also included a picture of the print orientation which allows to print without support. This orientation is not default as I modeled it on an Ender 3 as it sits in the printer.

It will also fit an Ender 3 Pro (I have that)

Print Settings

Printer Brand:

Zortrax

                                            Printer:                      
M200

Rafts:

Doesn't Matter

                                            Supports:                      
No

Resolution:

0.2

                                            Infill:                      
15

Filament:

Zortrax Z-ABS

                Pastel Blue                    
                        Notes:                     
Will be fine printed in PLA too I believe. I just used the same blue ABS Iu00b4ve used for other parts on my mods on the Ender 3 Pro, to keep with the color scheme.