Simple mount for custom sensor cameras.
Camera IMX462 https://spotpear.com/wiki/Raspberry-Pi-Starlight-Camera-IR-CUT-IMX462-Sensor-2MP-A.html
Raspberry should be with typical Aliexpress radiator https://aliexpress.com/item/1005007461091793.html

You are going to need 2 1/4"-20 UNC nuts to mount it on hotshoe.