You can find the “Washtastic” project here:

https://github.com/valzzu/meshtastic-pcbs/tree/main/WashTastic

This case is designed to fit an early version (0.3.1) of this board; changes will be needed for later versions. Everything snaps together (no screws). Use care while inserting into the case as the ‘knob’ on the power switch breaks off easily.

Supports are needed under the curved overhang of the back part.

Designed using OpenSCAD. Printables isn't currently posting .scad files properly, I will include them after this issue has been resolved.