Love this case "Raspberry Pi case for Prusa i3 / i3 Mk2" by hofftari https://www.thingiverse.com/thing:1325370 but I have a multi material upgrade on its way but the multiplexing board for the multi material upgrade sits where the Pi normally does so I did a bit of remixing and placed it across the other side of the Prusa MK2 above the power supply.
You just need some longer screws to go through the chassis from the Z Axis support. I think I got these from the bag of spares I already had from the prusa kit.
P.S. I have included the STEP file for remixing but these have been derived from STL files so are not ideal (but better than STL files!)