I can certainly feel your pain. With my DC only 2 weeks old, I backed into a metal street sign post!

Just the bumper alone, not including the plastic steps on top, bumper brackets (if they're bent) or ANYTHING else, was around 365ish, from my dealer... I think. I do know it was was less than $400 at least.
Hope that helps...
Update: Check THIS THREAD out! TS.com member (mit42ls) is GIVING his bumper away for FREE!! Can't ask for a better price than that! Shoot him a PM and see what he says. 