madkasel

May be you could try an EVA case,because it is cheap and it according your requirements to customized any shape.
I have ever custom an EVA case here: https://weihanbag.com/eva-case/tool-eva-case/
The advantage is cheap and custom unique shape.
But it need to wait more than half month at least to receive it.
If you could find exited design you need,it will only take 5 to 7 days.
Hope it could help you!