This is a combination of two great models. I really liked the OctoPi Case for Prusa i3 MK2S by Hackoholic. It's a perfect snug fit for the Raspberry Pi 2/3, but for a couple of reasons my cabling wasn't right with the Pi mounted high up on the back of the printer - my Pi power cable was too short and my USB cable was massively too long - only needs to be about 40mm.
I liked the mounting option used by jmillerfo's Prusa i3 MK2S Print Server case which hooks the Pi low down on the M10 threaded chassis bars and cable tied in place. However, that project is for a Raspberry Pi Zero with a Li-po battery.
I combined these two models make this Raspberry Pi case, it mounts on the right hand side of the printer with the the Micro SD Card is toward the front of the printer and the USB / network cable toward the Z-axis stepper.
In the photos the camera is mounted to the right hand Z-axis stepper, my intention is to mount the camera to the heat bed once I get a longer camera cable.
It's probably worth pointing out that the case sits exactly on the surface when on the chassis bars. Our Prusa has only the felt feet so it should fit with those or anything taller under the feet.
Printed in silent mode at 120% speed in PLA.