Sorry for the late response but work and other commitments have kept me quite busy lately.
When I restored my car during 1995 - 2000, I used a company named ASL to restore a number of my brake components. They had a number of smog systems for sale. When it came time to invest in a smog system, ASL was out of business. I called Rick George who operated Rick's 1st Gen Camaro Parts and he gave the name of the guy who restored smog systems for ASL and his business. I called and chatted with the guy and he happened to have a complete date code system correct for my car. I guess it was my lucky day.
If your looking for a system, inquire at the Camaro restoration supply companies. I also have found Hemmings Motor News be a good source.