yes they are riveted... not the regular rivets, more like the ones used on cloths and toys ( like Tonka car toys )... sealed, not with the stud. They are placed with somehow of C clamp. But just would need to get a similar size rivet... or enlarge a bit the holes and use some a bit bigger.

or tiny screws with nuts on back


With a Charger born in Chrysler assembly plant in Valencia, Venezuela