cost to replace the front bottom panel and where can I get it done for less on 2010 Toyota Prius

the bottom panel came off when the car went over a curb it got robbed off by the cement and came off the bottom of the car I am afraid this might damage the engine especially during the winter with the salted street

Asked by for the 2010 Toyota Prius
part most likely has to come from for est and geter done