Once again,
Jarek was designed a beautiful box for this device.
Model for units with the OLED display (aka indoor version)
Model for units without the OLED display (aka outdoor version)
The files required for 3D printing are freely available here:
Indoor Version:
https://www.thingiverse.com/thing:3608306
Outdoor Version:
https://www.thingiverse.com/thing:3608146
If you don't have a 3D printer, you can order your case directly from online 3D printing services like
3Dhubs.