accessory mount

Has anyone run across any 3D printable accessories? I was thinking about printing a few different things but wanted to get a jump start with some of the specs and measurements of the various components. I'm thinking cup holder extension off some of the grips on the passenger side. Or replace...

I found a decent approach for a really inexpensive way to mount my iPhone quickly. The 4K wide and regular on my iPhone 11 Pro is superior to my GoPro so this made sense for me. Since it’s tight to car there is no shake but again this is a poor mans approach vs throwing a gimbal or slider it...