Order the full set for the panel you are removing: originals are brittle by the time the car is ten years old and generally break on release.
Clips, retainers, rivets, bolts, nuts and studs — the consumables of a body repair. They are cheap and they are the reason a panel will not sit flush. Order the full set for the panel you are removing: originals go brittle with age and generally break on release rather than coming out cleanly.