I'm not sure I could recommend the reproduction RS grilles. Several years ago a friend was replacing the original grille on his 67 RS with a reproduction because his original was broken in several places. I noticed at the time that the new grille plastic was much thinner than the original. It was very noticeable, even when installed, so unless they've gotten better, you might want to see if you can find a nice used grille. I think someone here or on Team Camaro found a way to re-heat stamp the chrome edges, or found a company that could do it, but I can't seem to find the thread.
Ed