Got Hit in Parking Lot

Someone tapped me in a parking lot and did some damage. The left front fender is slightly bent (right next to light only), but can probably be bent back or ignored (I will try). My question is that the clip that holds the bumper in place by the side marker is broken so how much will it cost to be replaced? I am not sure if that is all the damage that was done since I have not taken the bumper off. Also where should I purchase this part from?