I was previously using a raspberry pi 3 B+ as my octoprint server for my Prusa MK3, but I felt that it was a bit overkill with the multiple USB slots and ethernet port that wasn't being used. Now that the 3 A+ has been released at a lower price point, I wanted to free up the 3 B+ for other projects but I couldn't find a case similar to the case by hackoholic (https://www.thingiverse.com/thing:2334119) that I was already using, so I decided that I would design a similar version using Blender.
I used the case design by RomanST (https://www.thingiverse.com/thing:1475572) as a starting point but filled in the big A and plus sign, and replaced them with simple slats. I then combined them with the hinge from hackoholic's design so that it could be mounted in a similar fashion with the power cord going towards the rear of the printer and the USB port directly above the USB port of the EINSY board.
This is just a rough design and I'm not much of a designer, so if anyone wants to make a better version, please do.