2000 Cavalier z24 rear bumper

I'm in need of a rear bumper cover, last night i wasn't paying any attention and i was headed out for the ngiht, and i backed in to my moms camry! it did more damage to my car than it did hers, good thing she has another car of her own...and a very good thing i didn't run into her tahoe! i just need a replacement of my back rear bumper cover and i'm having to pay for it on my own, and i priced one at the local dealership and they are way expensive...anyone know of what i could do or what kind of sites might have one for sale...thanks