Could you check if there is the option to have the billet cap come with a lock? I wouldn't mind the olds symbol but mine has a lock on it and I like to keep it that way, all nice an flushed.
I brought my door with a lockand custom fab a latch to lock it when it closed. I live in a neighbor where 3 of my neighbor got sand in their gas tank so henceforth the locking door.