I’ve been thinking a little about this, too, and have to agree with @infovore- just making a panel to hold the unit in a Eurorack case might not be as great an idea as it may initially seem.
An alternative might be just to connect it to a decent USB MIDI to CV/Gate interface, and/or a dedicated Eurorack USB audio interface.
Expert Sleepers make good candidates for both roles in their ES-8 and FH-2 modules. I have both, and can vouch for their quality (apart from the slightly loose jack sockets).
I’m assuming that Norns is able to access external USB MIDI and audio IO devices (I’m a Norns noob, so haven’t tried either, yet).