you'll prolly need more than a bumper. I got rear ended by a guy who was at a complete stop. He got rear-ended by a van who didn't see the stopped traffic, and he hit me.
Not only is my bumper scratched up, but the lower left bolt holding the bumper core to the car snapped off, and my passenger headlight doesn't fit flush. And i know he didn't hit me at more than 5mph max.
Get it looked at completely, cuz i thought mine was just a bumper cover too.
sorry to hear that. I had some jackass rear end me at very slow speed when I was stopped at a light. I was pissed, but settled with the guy without insurance getting involved. I got a quote from a respectable body shop for $500 or so.