I remixed three camera mounts to make them work with the Ender 3 S1 Pro. You need 6-7 M3 20mm screws, the two screws that are in the corner of the printer and the hing + screw from the c270.

What you need to print:
1x camera mount print
1x camera mount 1st part
1x camera mount 2nd part
1-2x tripod arms (depends on how long you want it)
1x tripod top
1x c270 hinge

First Source: https://www.thingiverse.com/thing:1228521

• use tripod_arms.stl, tripod_top.stl and c270_hinge_M3_screw.stl from the original source
• I remixed a tripod arm which is the connection to the horizontal arm piece, it's the Camera_Mount_2nd_Part.stl

Second Source: https://www.thingiverse.com/thing:3095730

• Remixed the swivel arm to make it fit with M3 screws (the hole for the bolt is still for M5. It can be a bit tricky to make the screw fit tightly but it works)
• Used the extrusion base, remixed it together with the third source and made it fit with a M3 screw

Third Source: https://www.thingiverse.com/thing:5560285

• Used the bottom part that fits into the corner of the printer
• Made the holes for the screws a little bit larger because the stock screws wouldn't fit in my case
• added the extrusion base from the second source on top