A quick brace insert I put together using Fusion360. Has a VGA Input and Output (I used VGA couplers and a VGA splitter) as well as a KeyStone Jack bracket (https://www.thingiverse.com/thing:3562334) and two USB Type C ports.
The lettering comes out okay if you print with the lettering facing the print bed. This also limits the use of supports.
I designed this so I could have a rackmount enclosure for my TinyPilot IPKvm setup: https://github.com/mtlynch/tinypilot
I used velcro to hold the pi somewhere convenient in the case, and all of the required adapters and such fit internally as well. The case fits together "okay" but there is some bowing when the screws are inserted. If I had to go back I would design a new enclosure from scratch, or add additional securing points to the long edges of the flexible panels.
Links to hardware used to assemble on Amazon: VGA Female->Female Coupler: https://amzn.com/B07H79DB1S VGA Male -> Female Coupler: https://amzn.com/B00COOUPKA VGA Splitter cable: https://amzn.com/B07MLM39CD USB-C Panel Mount Cables: https://amzn.com/B075R7QBQD
Basically I wanted to be able to have video going to my TinyPilot setup in the rack, as well as my dedicated rackmount KVM console with video passthrough. Any keystone jack will work. The recommended TinyPilot hardware was used, including the designer's power adapter. Note that his power adapter takes Micro-USB, and above I used USB-C cables, I had to get adapters for this. You could use Micro-USB instead, but I prefer how secure a USB-C cable plugs in compared to alternatives.