I have a few from a HD cam source that I brightened up the best I could (they're still quite rough though), I'd like to make sure it's ok with the forum staff though to post em though since Disney seems to be shutting down all the youtube links pretty hard.
I can say though, the right ear appears to be a mirror of the left ear, and the helm does have rear keyholes (though it's difficult to tell how different they may be from standard fett ones though)