I had the dealer put a locking chrome fuel door on for me. They centered it perfectly and it looks great, in my opinion. Believe it or not, I have seen some of the chrome locking fuel covers with the lock on the LEFT side, instead of the RIGHT side. That means the dealer had it turned around. Do you know what I mean? I guess it might be better that way if you're left handed.
If you want the key to go in on the right side of the cover, be sure to tell them prior to installation. AND, bug them to make sure it's on tight. I've seen the seal on some sticking out or lifted. Since I'm picky with stuff on my H3, I repeated myself a couple of times to the parts manager. Once it's on, it's on ... might as well make sure it's put on right. I believe I was charged $225.00, installation included.