Reolink E1 camera bracket/holder that slides securely onto a Joie baby crib railing (⌀ 35 mm).
Camera base fits snugly in, power cable connects through an angled hole and clips into a groove.
Printed in Amazon Basics PETG. Tree support needed for cam hole cutout.
Update: It also fits Ikea SNIGLAR crib and a common Amazon playpen. Updated the bracket thickness for firmer attachment, and made a hole to actually get the camera back out.
It's not perfect, so use the Fusion360 file to adjust.