Here are two different Lezyne GPS computer mounts.
Both have had the Lezyne mount area tweaked and reinforced to provide more secure mounting of the computer.
I've printed them in PETG and they work well. I can't vouch for PLA.
Lezyne_-_K-Edge_adaptor.stl | 357.7KB | |
lezyne_mount_for_GoPro.stl | 305.2KB |