The doors are dimensionally the same But in order to incorporate the hinge support and the bracing the doors are actually different internally...plus switching them from side to side would take some fabrication work.
The holes there or for the Australian spec license plate lights. My Australian spec rear bumper was long gone and an aftermarket bumper with light holder was installed when I got it. I ditched the aftermarket bumper and then removed the lights and added them to a special plate.
See overlander work thread in my signature. Postal specific thread coming in November