For custom builds, I usually resort to standoffs or double sided foam tape. This 3D printed solution simplifies that step for me by giving a clean place to mount my electronics.
Another part that bothers me is needing screws to mount the circuit board so the part was designed to use these plastic push rivets instead:
Few more photos and info of the build here:
You can download and 3D print the bracket yourself here:
Let me know if you have any suggestions or questions. Thanks for the looking! I hope this is useful for someone.