I know battery covers without the camera holes are out there, couldn't point you in any particular direction though as I've never had a need.
If you're working for your government's defense department/ministry I probably wouldn't try and sneak it by them as it's likely on the list of things they check. you'll know your employer's own security best though. You could always remove the camera module from the phone as well...
otherwise, the 87xx and 88xx series BBs don't have cameras.