After watching a few 3D modeling tutorials on YouTube, I designed a simple camera mount to prevent the sunshade from hitting the rear dashcam when it goes up. It's pretty basic and inelegant, but it's my first design so I'm pretty proud of it.
I'll probably improve on its design to minimize the gap between the mount and the headliner, but I'll let it sit for a month or two first to before tackling it again.
Link to the shade in action:
https://imgur.com/dXPkif2