There are two of these L brackets used at the base of the 69 - 70 Coupe and convertible. These are what the windshield rests on. We also have the plastic channel strip that goes along the bottom edge of the glass.
We do not list these items so as to frustrate you but rather as a reference as to what the item looks like and how it fastens to your car. We suggest you take a good look at the reproduction version of this part.