I use this as a dashcam and a blindspot monitoring system because it is mounted at the back of the cab
https://brandmotion.com/product/fullvue-rear-camera-mirror-fvmr-1000v2/
Brandmotion has an option https://brandmotion.com/product/universal-dual-mount-cmos-camera-9002-7601/ and then you would need an interface depending on which screen you have, they have those also and are in their vehicle guide, I switched out to their FullVue mirror/camera