Pre Owned Trucks Need Help Finding Pre-shaped Replacement Cab Corners And More Sheet Metal!!?

Need help finding pre-shaped replacement cab corners and more sheet metal!!? - pre owned trucks

I have a 1993 Ford F150 Super Cab that rust (corner rear fender no rust typical Flareside truck). I wonder if someone could give me a website that parts molded plate for these two areas are selling links. Or can someone tell me what kind of metal should I buy for my own where I could get, like Home Depot to do?