If you have a sample take it to Scots and maybe they can find something that will work. I have the same issue with my 66 Dart. My son has a 3 d printer if we could design the software.
The 66 GT dart uses metal clips to hold on the stainless rocker trim.....And they are not repoped. I included a nice set with a few spares when I sold my 66 to @Ddaddy . He might dig them out and see if he has extras, he is a nice guy like that....
