@Cawfee It depends what version you have. Files for the enclosures are here: https://github.com/Duet3D/FilamentMonitors/tree/master/Filament_Monitor_Magnetic
Drawings of the hobbed assemblies here: https://docs.duet3d.com/en/Duet3D_hardware/Accessories/Rotating_Magnet_Filament_Monitor#hobbed-assembly
User @Lo-Fi has also produced some new housings for the older version (v1 and v2) in OnShape, see https://forum.duet3d.com/topic/27780/redesigned-the-mfm-housing/31

Let me know if you need anything else.

Ian