70 Dart Quarter extension gasket

@str12-340
I had (2) 71 darts - drivers then parts cars. Only one had the gaskets (hard plastic) on both front and rear extensions (pic above)
My 70 340 dart only on the front fender extensions
All of them had seam sealer on mounting nuts
Detroit Muscle Tech looks like they offer them in one of their gasket packages
I’ll try to post a pic of it here