I wanted a good raspberry pi 4 case with a vesa 100 mount, so remixed a base and a mount.
Vesa base from https://www.printables.com/model/194774-vesa-100-spacer/
Pi case from https://www.printables.com/prints/4074-malolos-screw-less-snap-fit-raspberry-pi-4-model-b - you'll also need a lid from here
The author remixed this model.