For those looking for the HARD plastic rock guards that are in front of the rear wheel wheels. here is a link where I bought mine:
http://autobodyfillersusa.com/1976-1...ller-kit-2-pcs

I bought a set but decided to go another dirrection, these are the factory original style hard plastic guards that help deflect debris from the wheel well curve. I am asking $30 (USD), they are located in Iowa, 50538