Used the Anker Vertical Mouse model from here:
https://www.printables.com/model/113133-mouse-shape-tester-megapack
Altered the base slightly to fit the very similar AliExpress version (The one I'm using for this case):
https://www.aliexpress.com/item/1005006016792928.html
Needs 8x 5x5 magnets for the 4 corners of the lid and base, but you can alter the STEP file for your magnets.
No supports needed.
The author marked this model as their own original creation.