Lapband surgery isn't like taking a pill. There are significant side effects to having a stomach the size of a silver dollar (go read internet, they are documented). I think that's not a good idea.
What foods are you eating? It's pretty hard to overeat on leafy greens, fruits and vegetables, chicken/turkey/lean beef or pork, brown rice, that kind of thing; it's just not that calorically dense. Is that the kind of thing you're eating most of the time?