I designed my own C270 mount using the stock mounting material of the camera.
This mount is meant for TeachingTechs "Flexible webcam mount for Octolapse"
Shout-out to Michael aka TeachingTech: Love your Channel and your dedication to the Ender 3 / 3D-printing community. Keep up the great work!
I used the HXSJ S70 camera mount as basis, because the geometry of the C270 mount is quite similar.
I measured every detail of the original mount with my calliper and adopted it to my design. For example the flattening of the through hole to prevent the fastening pin of turning. (last picture)
I included some slight tolerances of 0.1 - 0.2mm, because my Ender 3 tends to print everything a bit tighter.