Sandbag and some careful tapping with a wood bucks, and hammers will straighten most of them.
They are also common on Dodge trucks and vans, so check them when junk-yarding.
Truck ones are painted. 1973 up are aluimiunm spun and polished, and anodized. No stainless steel.
Here is 2 NOS sets I got at my local dealer years ago. For reference, painted truck and car. And as we know the police-taxi with holes