Schneider Electric does not currently sell a case for the PCM4 portable circuit monitor. The recommendation is to buy a Tool case with wheels and a telescoping handle.
The minimum inside dimensions required to fit the meter + cables + Clamp-on CTs are:
23 inches by 15 inches by 11 inches.
The following links are to web sites that may offer appropriate cases.
Click the link: https://www.plattcases.com or https://www.justcases.com/delwheelship.html