You might be surprised what a good body man can do with stainless or aluminum trim once it is removed from the car. Otherwise you are looking at good used or NOS.
If it’s the rails your best bet is to have them removed and agree with Kevin there are good sources to straighten and redo those pieces. You’re gonna probably need the extra step of having them re-wrapped but I’ve have chrome trim done and it’s come out beautifully. Some of that early ‘70’s hood trim on the fords will dent if you look at it wrong. Good luck.
