2002 Ford Mustang Base

I just accidentally bent my crank shaft pulley. so when my car is idling the metal scraps and causes friction witch makes it stall once in a while when idling only. just needs new crank shaft pulley. Here is everything i changed on it in the past 3 months i had this car. coil overs, new clutch, new fuel filter. changed all the oils, new spark plugs. new cords for the spark plugs, new power steering pump, new idling pulley, new thermostat, new battery, has a good radio system, new antenna. Shoot