Anyone know which part number or if there is any particular type of screw and backing that will work here to tighten the bumper (not screw the bracket into the car itself)? Mine fell out and I need it to tighten the bumper back on after reattaching it. Just the screw and metal piece it attaches to, the bracket itself is fine. I can't tell which one it is on any of the part stores diagrams. Thanks.