I used Boogie's "Case holder for "Malolo's Raspberry Pi 4 Model B Case" with fan" and added the frame snap so it can be snapped on to the frame of my Prusa MK4.
For better pictures I put this on the front of the frame. For better results It would work better on the rear of the frame. The bottom does not go any lower than the frame so it will not interfere with any of the moving parts. There is some clearance in this bracket to possibly allow for slightly larger cases than the one mentioned below. I would recommend you get some measurements before proceeding.
I am using this setup with Octoprint. Waiting for some shorter cables to come in to make this setup a lot cleaner.
The Original model is here:
https://www.printables.com/model/13649-case-holder-for-malolos-raspberry-pi-4-model-b-cas
And the case is here:
https://www.printables.com/model/4074-malolos-screw-less-snap-fit-raspberry-pi-4-model-b