I made this case out of red oak wood on a CNC mill/router, though it can be 3D printed.
You'll have to determine yourself the print settings, supports, filament and others.
It is in 2 parts held by (4) 6mm dia x 6mm long neodymium magnets.
Overall dimensions of the case with the cover are 1.550" x 5.110" x 8.500" (39.4mm x 129.8mm x 216mm)

Designed and programmed with Fusion 360