Are you talking about the rivets that hold the inner fender to the front facia?
I would drill them out and replace them. But I would use replaceable type
of rivets similar to the ones on the rear facia. That way you can remove
them again if necessary and they are easier to work with. More importantly
less expensive. NAPA has them in different sizes.
You could buy the rivets and rivet gun to replace them or go to the dealer
to let them reinstall the rivets.
Last, you can manipulate the rivet with pliers. Place the rivet in the hole,
hold it flat and pull the pin out. I was not successful doing that.