Relay case for Raspberry Pi 3 Model B

Update at 2018-Oct-02:
Added a relay cover part. This part block out the normally-closed port for fool-proof design.

I just need a housing for Raspberry Pi and relay board.
It have the following further requirement:
1. Screw less
2. have slot for cable management
3. Zip tie is allowed, but minimal use.
4. Provide mount point for fixing the entire object to other place.