That sucks! I'll bet a nickle it's a replace the bumper thing. Go through your insurance and they'll get it fixed like new.
I have never leased before. Actually, for this very reason I like it. I would normally be like, "Oh gawd, it's trashed forever. It's not perfectly originally anymore!"
Now, it'll still hurt, but it somehow feels more like, "Ah well. I'll have a new one in three years anyway."