Help! I've got some older type lever aluminum jalousie windows. I'm faced with two(2) types of problems: (a) the two(2) rivets that hold the lever to the window have broken off leaving two(2) holes and (b) the rivet that goes in the middle of the lever (the one that provides the lever action) is broken off. My main problem is how to fix the rivet that goes in the middle of the lever. I can't use an ordinary screw and nut because it eventually unscrews itself. Any body got any ideas? Thanks much.