This model is based on another model from Thingiverse, but doesn't seem to be available anymore.
This one tries to fix all issues with that other model and make it work better for FDM printing.
I don't claim any rights to this model. Still, I wanted to provide a “fixed” version to the flawed model that's floating around. I hope this leads to fewer failed prints and to less wasted material.

One problem with the “original” model was, that the bottom and top shell didn't really fit.
Also, it was adapted to use screw inlets instead of bottom and top shell just being sticked into each other.
There's multiple ways to print and assemble this, so you don't have to download and print all the available STL files.
The bottom shell can be printed in two different ways. If you still have the RF shield, you need to use the “Bottom Shell with shield” file.

If you don't intend to use the RF shield, you can use the other Bottom file. This has more stability, but the RF shield won't fit.
The holes for the screws will be filled. You'll need to open them with your favorite rotary tool. This is because the FDM-Print will be much cleaner this way - without the need for support structures.
You can either print this as one whole piece (requiring Supports to be printed), or as two pieces (requiring some glueing).
The screw inlets are modelled for M3 screws.
The author hasn't provided the model origin yet.