This is a hybrid of Ender 3 X Gantry Cover w/ Camera Mounting Arm by UnknownVar and Raspberry Pi Camera V2 Mount for Ender 3 v2 by crsn00. I cut and trimmed the gantry mount, then took the ball mount from the PI camera kit and incorporated it into the design.
The PI camera kit was my initial print, but I found it blocked the home switch for the X-axis.
I'm new at Blender, so I didn't know how to manifold it properly (I made new vertices and faces instead of blocks). I ran it through the Formware STL Fixer, and it cleaned up my manifold mistakes.
This gantry arm uses the ball mount and camera housing from this kit
ball_mount_fixed_by_formware_co.stl | 599.1KB |