The two braces in the picture are a 1973 Camaro RS only part that currently is NOT being re-produced.  I finally not only located a pair, but they are New Old Stock (NOS) – off the shelf parts that were never used.  Still has the original GM stickers on them!  These attach between the fender and radiator core support and were required on RS models in 1973 to strengthen the front-end in case of a crash.  It is going to be a hard decision to put these on the car, but I have time to think about it.