Renamed the original part to include the 48mm height description.
Added a 3mm shorter part - in height. Removed from the bottom.

Based on images on Geetech's Blogpost DIY your own 3D Printer- part 1.

View the 3D model at Autodesk where you can download it in different file-versions.
48mm model
45mm model

JennyPrinter

No

No

0,2-0,25

70

You want this to be strong, so use 2-3 perimeters and 70% infill.
I have printed with 0,2 and 0,25. Both worked fine. Guess pretty much any layer height would be fine.

Print it HOT to make it strong.

I eye-balled it on Geetch's blogpost DIY your own 3D Printer- part 1 combined with factual dimensions on motor and mount-holes.

Credit goes to Geetech as I created this item based on their photos.