It probably just needs a few plastic rivets or pushins. Even if the holes have pulled out through the edge of the bumper cover, they can be fixed and reinforced with an epoxy kit from AutoZone for about $10. They have the plastic hardware too, in small packages for high prices. The black inner fender probably covers what you need to get at to fix it. New bumper cover and repaint by a body shop, $750. Fixing it yourself, $15.