Door Panel Push Pin Clips, 82-92 Camaro/Firebird New GM, Package of 10
If you are installed new window motors or adding sound dampening, you WANT to replace the pins!
easy to install with a pair of plyers (you twist them on and off)
strong enough to hold my 1/4 layer of Mass loaded vinyl and high density foam between the door and my panel.
Door Panel Push Pins
About as good as you can find in replacement plastic fasteners.