Slojoe, as an alternative, Hall Pantera used to sell wiper delete cowl vent grilles. They were identical to the OEM grilles but with 2 differences; there was no hole for the splined wiper drive units and they were attached by tiny, black screws instead of pins. In order to use them with wipers, you’d have to drill a hole of the appropriate size in the appropriate place. Since Pantera’s were only produced with passenger side parking wipers for a few years, finding the used grille you’re looking for could be difficult but if you are reproducing them, just put the hole in the appropriate location. Years ago, Bob Byars (Precision Pro-Formance) told me he had EVOD reproduce the wiper grilles in billet aluminum but decided not to market them because they were too expensive. I wonder if EVOD still has the program?
Hall Pantera is also an often overlooked source of used parts. Don’t forget; they are closed on Mondays.