I looked at many Pi cases with various screen sizes and even tried to mod them to fit my devices, but in the end none of them printed very well or seems too flimsy. I ended making my own based upon simple to print and easy to assemble designs. The case can be used to with a HQ camera housing attached to the base. 

The case uses four M3x12 bolts to hold together.

Here is a a tinkercad link to the files if you want to remix to fit your components.

https://www.tinkercad.com/things/iNYmWw8zvtB