This is what the original clips look like:
My coupe only had 3 of these, so I made some very simple brackets and they worked just fine, see the attached pics. The screw hole is in the center, the pictures show a piece of raw material that has not yet been cut into individual brackets, the portion of the piece shown would make three brackets. They would be cut off midway between the bolt holes, overall length of each is 1 7/8". The material is 1/4" by 1/2" aluminum. The screw holes are 8-32, if I remember correctly. The countersink in the material is for clearance for the countersunk-head screw so that it won't bottom out on the aluminum when tightening up to draw the ears up against the body, serves the same purpose that the step in the original bracket does but much easier to make on a drill press. Hope this makes sense!