Duane Heckman of Classic Car Interiors makes several hard to find reproduction for the GS/Skylark line of cars. 71 hood inserts, spoilers, the proper rally mirror base gaskets, disc brake pedal pads and various other items. He also does build sheet decoding and helped develop the judging rules for some events. Duane himself is a very knowledgeable and friendly guy, is heavily involved with documentation and restoration of these cars. If he can't answer your question, chances are nobody knows. I have his mirror gaskets and disc brake pedal pad on my car, see the final assembly page for pictures.