I hope I don't need to send the camera to Nikon. Atlanta has two Nikon Authorized shops. It would be silly to have to lose the camera for three weeks for a minor part. Precision Photo (www.bocaphoto.com) sells camera doors for under $20 for most earlier X00 models. Of course, the shape of the door on the D800 is different from the others.
This is the second time the battery door has come off in normal use. I have some concern about the design.