360 Degree View 4 Channel Mirror Dash Cam Detached Camera for Cars，Dash Cam Front and Rear Side(Left,Right),12'' Rear View Mirror Camera1080Px4,WiFi,Night Vision,GPS,Parking Monitor,Free 128GB Card

There are plenty with 2 extra cams off to the side of the main unit, but it's still from inside the car so likely still cuts off a lot, but with a quick search on amazon for "4 channel side dashcam" there is THIS one with outside mountable cams that might be worth looking in to, or atleast maybe others like it.