I'm having a very difficult time finding a coupler lock that fits my trailer. I want to use something more than just my regular master lock to secure my trailer during the day. I figure that since a master lock is fairly easy to cut through, I'd look into buying a coupler lock. Well, I've got a 2-5/16" coupler but it is fairly wide so some of these coupler locks can't fit on it. Here's the coupler that I have... http://www.etrailer.com/Trailer-Coupler/Atwood/80281.html?feed=npn Anyone have any suggestions for me?