While it's certainly possible to adapt other cameras and screens via breakout boards you have to make for the FFC cables to match the pinouts (there's no standard for this really), you also have to make sure all the signal voltage levels work with your new devices (e.g. 1.8V digital interface of the CSI bus, 2.8V analog supply, backlight driver current and voltage for the LCD, LCD MIPI interface, etc.), so it's not a trivial hardware hacking task. And then adapt the devicetree and kernel drivers to support your new devices. So it really comes down how familiar you are with embedded hardware and Linux kernel hacking?
Come have a chat in the Pine IRC channel >>