For most insurance companies, claims bellow $1K are not chargeable, call and ask.
Look online for used bumpers, car-parts.com is one site. You can have it painted for $200 and then install it yourself.
Recently, my friend had a similar damage on his leased car, the local body shop quoted him $1200, but we send him two towns over and they fixed it for $600 and actually did a decent job. Ask around.