I already placed the plastic ones beside the metal ones and uploaded pics a long time ago. There is no difference in the ones I have.
I admit I don't know what these plastic ones came on or from.
I want to say early Duster/Demon.
I am aware of a difference in width and bolt hole locations in plastic shields from late model Darts.
If I thought there was any chance these plastic shields wouldn't work, I wouldn't let go of the metal ones.
Evidently the original poster doesn't want them anyway.
Good luck to all.