Here is our working coppy of BigClown Enclosures in Openscad:
For now with these models:
BCE101r2 - Mini Battery + Core R2 + Mini Cover
BCE102r2 - Mini Battery + Sigfox + Core R2 + Mini Cover
BCE105r2 - Mini Battery + Sensor R1.1 + Core R2 + Cover
BCE106r2 - Mini Battery + Sigfox + Sensor R1.1 + Core R2+ Cover
BCE301r2 - Power + Core R2 + Cover
BCE304r2 - Power + Sigfox + Core R2 + Cover
BCE305r2 - Power + Sigfox + CO2 + Core R2 + Cover
Use the latest Development Snapshots of Openscad.