Raspberry PI USB3 Hub & Additional Network Port - Rack Mount 19" 2U DAP Adapter

Rack support for a USB 3 hub and additional network port, looped back via a keystone jack.

Any keystone can be inserted in the slot if you didn't want to use it to pass back the network connection, such as a HDMI keystone to pass video out the front.

The hub can be found on Amazon and is a pretty generic and easily found hub.

I found getting the perfect fit a little difficult so if your hub doesn't sit super tightly I'd recommend a layer of 12mm wide Kapton tape to give you the perfect fit. I had to apply a single layer to my print to ensure it can't be accidently knocked out.