Radiator fan. Overheating

Hi, I have a 2006 chrysler pt cruiser. I recently had a minor accident and my radiator was pushed in. I replaced the busted radiator, but it pushed into the radiator fan. The mechanic told me that the radiator fan burned out, so I need to replace it. I am shopping for the parts b/c he gave me a price that everyone said was way too high. But I don't know, is it just the fan assembly or the motor that I need? And can you tell me what a decent price is for either of these parts? Also what is an average price for installation? Thanks much!