I have been losing the pins that hold the underbody, wheel well, and bumper panels in place. They're designed to break off in the event of an impact so that the panels themselves don't break, but they shouldn't be falling out. I've bought 3 different types from AutoZone, and the closest ones they have (when comparing dimsions) fall out too easily.
TL;DR: where can I get some OEM body clips?