Several years ago I carried a clean 67 B'cuda metallic red sun visor and a NOS metallic red arm rest pad into a local paint store that custom mixed SEM. The guy nailed it. A quart in RTS was 72 dollars. I don't know if I still have that formula here or not.
If you end up finding it, please let me know. Otherwise I think I’ll try a can or two of this stuff like Syleng1 said…. And then try a paint match if that fails to satisfy me.