mustube

Okay well my friend was in a fender bender after homecoming a few weeks ago, and the body shop needs to put a new bumper onhis 2000 coupe GTand my friend wanted to know if they could install a saleen bumper for him, but they said there was some other kit or something that they needed to install. Is this just a case of stupid body shop people, or is there really some other kit that needs to be installed and if so what is the kit and what is the most you would pay to have the kit put on for you by a body shop. Thanks for all of y'alls help!!