65 Barracuda daily driver

Nothing too spectacular, but I finally got the splash shields back in after 5 or 6 years. I also had the DMT seals and new bolts laying around for quite some time. I think I'll have to spray some black paint on these rear bolts. Too shiny!

7ihThrH_tcNxdtP1Z0zXPfCVb-kBmvIARuyD3S2XlFRYzDF0CynZxzkDbn4zJ8Ukj2Xj-Ff=w800-h1066-no?authuser=0.jpg

5gEQVkKI67wQZIPb7BzngNonzc-xEc9iRJhfwFvbakGpOisWTUfP8ryML--At7-QkTWGCV2=w800-h1066-no?authuser=0.jpg

I'm missing one of these click-in nuts (?) that mount the front splash shield to the inner fender (like on the left) - does anyone know what they're called and where I could get one? Using a regular old nut obviously works (on the right), but if I could find one, I'd like to make it original. (And yes, I need clean up the dirt that's still on the car from driving through the desert).

QIOcZ6KKoeQIbEOyHG4j4VTNdh69yfcROzYXIeCDpIAYSdbZMdNTXY1dLHoU6omLA1AVgb=w1422-h1066-no?authuser=0.jpg