Car button missing

I'm missing a little button in the car. Why, seven months after leaving Japan I am suddenly missing something from there, I don't know. It was a button I used every day, too! The button in question is the "close the side mirror" button. Yes, Japanese cars have buttons you press to fold the mirrors in (see the car in the picture). The roads and car parks are so narrow that it is safer for you (and others) to do this. I've knocked a hip or two on mirrors that weren't folded. I wondered why so many small (read one or two child) families had vans in Tokyo. After owning a van here in Australia I am beginning to suspect that one reasons is because of how narrow the car parks are - with a van, kids can open the door without risking anyone else's car! We ended up buying special rubber things to go on the door so that WHEN it hit other cars, it didn't dint them. Nevermind, I'm sure that I can get another button when we return :-)