Not a easy part to replace but at least you can now....
This is the premade chrome mold for either door on a GM 62-64 Big car COUPE series.. pillarless 2 door.
It may be able to be reduced in size for a 4 door car also...maybe as far as we know its the same profile but on a 4 door a few inches shorter.
Supplied each.. ie LH is USA drivers Side.. etc..