Well it sounds like you might have messed up your factory holes. May be able to hammer them back closed then start the correct ones, don't over tighten and hope .
You'll need two like this. Jims Hardware lists will provide the details
Not going to find them at the hardware store. The hardware is a pane head Phillips screw with a fairly large captured washer. Unlike most pan head screws these have an edge created along the outer surface as you can see in the picture.