fender

I found a 95 bronco that has rust along back fender well, I haven’t seen it in person but this looks like a common problem. Can I put cutout flares to cover this and treat the non rusted area?

I was curious, where is the cheapest place to find body parts, cause i need a drivers side fender, grill shell, and bumper and i dont have alot of money and need it fixed pronto. thanks for any help you can give