This is a remix of the Ender 3 v2 X-Axis Camera mount. I've extended the arm by almost 14.5cm and added an end piece that is 6.77cm long that you can use to better angle the camera.

Best to print it laying flat with at least 3 walls. I printed 15% gyroscope infill and it's nice and solid. No supports needed. You may need to rotate it 45 degrees on your bed so it fits.

You'll need 1, ¼" bolt that is ¾" long and a 1 ¼" nut to attach the end to the arm. I used 2 ¼" washers on the camera screw to give enough tightness when attaching the camera.

The screws came from this: Anycubic I3 Mega Z-Axis Camera Mount C920/Tripod Screw by Aerocalculus - Thingiverse

Because I used Tinkercad to modify the files I don't have a step file to provide if you wanted to make changes, sorry.