I broke two clips trying to get the interior door trim off my 88 420 sel. I need to replace the door stop mechanism, and took the two large screws off the door pull handle, the small screw at the bottom center, and then proceeded to lift up on the trim. That didn't budge itm so I tried to tap up the clips the loosen them, and that's when they broke. Any suggestions? Are the clips available in the parts section in Parts Shop?