Hi there,
Using this: https://www.musicstore.com/en_DK/DKK/DAP-2-HE-Rackblende-f-Modulsystem-10-Segmente-MP-1/art-PAH0017160-000 modular 2U system, also called MP-1.
I created this one as i needed to use the original Raspberry Pi 5 Power Supply, and my other design here (vertical): https://www.printables.com/model/727707-raspberry-pi-5-1u-rack-mount-single didn't really create space for the USB-C cable, as it would interfere with the Rackunit above.
You can print this and screw into it, to have a nice neat 2U unit for your Raspberry Pi's and other stuff you and others might design. You only need 2 M3 screws 2 M3 Nuts to screw the Raspberry Pi into this model.
Krapozok had the idea for Raspberry Pi 1, 2 and 3 on Thingiverse. Mine is created from scratch for Raspberry Pi 5.: https://www.thingiverse.com/thing:1793758
Also available at MakerWorld: https://makerworld.com/en/models/157923
The author marked this model as their own original creation.