Replying to Bindings ripped out

So on my line stepups I had one mount filled in. The mount being used is like 1cm or so away from the previous filled in hole. The heel piece on the one ski ripped out and now three of the 4 holes are stripped. What would anyone recommend me doing? Ive thought of trying those quiver killer things or just buying helicoils, but the thing is that idk what would happen since the holes are so close together. any suggestions appreciated.