66 barracuda moulding clips needed

I have a couple of those cars that didn't come with the lower plastic rivet clips. They're both from the LA plant and they used phillips screws straight into the rocker panel instead. The holes weren't drilled for the plastic insert... just large enough for the screw to start. The upper hanger clips are the same however. They must have run out that day! I guess they must have drilled the holes and installed the rocker moulding at the same station or they would have had a mismatch when they tried to hang the moulding. I always thought they drilled the holes before they painted the car but I don't know how that could be now. Do you suppose they forgot to drill them out to the proper diameter and when it got to the rocker moulding station, they realized they couldn't install the plastic rivet and just went ahead and ran some screws in?
Thanks, Mark