My company is building a new surveillance van. We would like small vehicle cameras like you would find on a Tesla around the entire van for situational awareness. The vehicle may or may not have an investigator in it. We plan on installing poe cameras on each side of the van. Mostly aiming out the windows. The vehicle is a sprinter van. Above the standard tinted windows there will be untinted narrow bunk windows. They are to high up for someone to see in without a step ladder. We want to install one wide and one ptz camera on each side so we have recognizable face shots included with wide angle shots. In addition we want Tesla quality mini cameras around the outside of the vehicle, so that the investigator inside can see if anyone is near the vehicle and who they are. Mostly the vehicle will be parked longterm with no one inside. We plan on operating the cams through blue iris. Most backup and vehicle cameras are designed to work with a head unit. We just want to operate through the NVR so they are recording and we can view remotely. Can anyone recommend exterior cameras that can be recessed in the body like a backup camera? The quality needs to be pretty good but remain small and unnoticed. In searching for cameras there are many, but none seem to specify the video signal type or the connecting type and all are referenced as connecting to some proprietary head unit. Thanks for any input. Steve