This is actually a remix of sheppard47's remix of Teching Tech's AIO electronics case. (https://www.thingiverse.com/thing:4639576/files) The standoff location is correct for the SKR Mini E3 v3, but the plastic tabs for the heatsink stick out too far below the board. He also had forgotten to make a cutaway for the cable chain opening.
The IO ports on the board barely clear the opening, so you may have to cut away a small bit to use the ports.
If you print this with supports, the long hole to connect it to the RPI side can be entertaining to remove. Just a warning.
The author hasn't provided the model origin yet.