Hi Benjamin6,

We're sorry to hear that your charging case broke in an accident.
You can get a new charging case based on the colour of your unit using the below part number.
Black charging case: A5036917A
Platinum Silver: A5036918A

Sony Europe

I couldn't find it on Galaxus, but if you search for "Sony WF-1000XM4 case" on Google, you'll find other shops that sell replacement cases.