I got in an accident and driver side rear fender needs replacing. Is there anyone who knows how to remove it?

The car is a mazda protege LX 2003
I'm not looking to replace it. I don't want to be overcharged for the fender so I wanted to take one off a car at the dump. Last time I was there getting some spare parts there is the exact model of my car with the same colour pain and the rear end is in good shape... cant say the same about the front end though.