I made a simple enclosure for my MK4, based on an IKEA Platsa cabinet (great tip btw). I put the entire enclosure on tall feet, so that I can put some stuff underneath, like drawers or tools.
To make sure the door can close and there is enough room at the back for the bed to move, I changed the position of the display to under the enclosure. That way you can also control your printer without opening the door.
Installation
Printing
I printed in PETG, with 4 perimeters, top and bottom layers, but honestly I think that PLA will work just fine. Since you put it on the outside of the enclosure, the temperatures are not going to be that high usually.
The author marked this model as their own original creation.