Looks like you have some damage to the fender and grille too. If you have time, I would recommend pulling the bumper and grille to determine the extent of the damage. You may even need some headlights.
Ah same thing happened with my rig a while back. I finally got time to work on it yesterday. Just like shadow247 recommended, pull it out to see what the damage is. There are four screws holding in the bumper. For the bottom fender, there is a screw all the way on the side, one on each side, that you'll need to remove as well that connects the fender to the body. I'll post a pic up later of how it turned out, wish I had taken a before picture - it was pretty banged up on the right side. I had to literally pull mine out because it was so bent in. Also had to use a monkey wrench to straighten it back out.
Back to your question, bumpers are pretty expensive unless you go to the junkyard and just get an OEM part. Looks like we have the same model too!