I use a Chieftec Pro Cube CI-02B-OP Case, because it fits exactly into the IKEA Kallax/Expedit shelf unit.
It only has 2 USB Ports in the front, so I redesigned the 3,5 inch (floppy-disk) cover in Fusion 360, which can be modified to your needs.
The first iteration is just an air-flow variant, as you can see in the preview.
For my needs, I will create a version which allows two additional USB ports. You can add whatever you like, as I have added the fusion 360 archive.
Have fun :)
The author marked this model as their own original creation.