This is a very basic remix. All I did was remove the ears using the source file provided in the original. I didn't make any attempts to smooth out the areas where I removed the ears, so you can still somewhat see where it was removed.
I was able to fit a standard adapter into the bottom of the device, and it fits very well on a mini tripod.
Edit: I added STEP and 3MF versions from F360. You will need to flip the parts around if you want to print them flat after loading the 3MF version into your slicer app. I would strongly suggest breaking the object into two separate parts, which PrusaSlicer will offer to do for you automatically.
Memento_Case_-_Back_-_No_Ears.stl | 221.5KB | |
Memento_Case_-_Front_-_No_Ears.stl | 129.2KB | |
Memento_Case_-_No_Ears.3mf | 164.8KB | |
Memento_Case_-_No_Ears.step | 555.7KB |