I purchased an electric screw driver off of amazon on a lightning deal. But it didn't have a case so I designed and printed one. I printed mine in PLA. It fits all 4 bit sleaves and the driver. The charger does not fit inside since I wanted it more compact. A short section of filament acts as the hinge pin. I just melt the end quickly with a lighter to make it larger so the pin doesn't fall out. You could also just put a drop of superglue on one side of the filament to lock it in.

Here is the electric screw driver I designed it for: https://www.jakemy.com/product/jm-y03-plus/

I have provided the STL, the native Solidworks file, a Step file, a Fusion360 import, and have the Onshape linked below. Modify and remix as you see fit.

Onshape: https://cad.onshape.com/documents/df21e6222cd0a6e96fd3e5b1/w/8f93c093ee2859af8746ccfd/e/acbbea13dfce45a6db22468a?renderMode=0&uiState=6318008111b17c3c05ad8d35