UPDATE:

I got a call from David Hakim at Mopar Performance. The original vendor has been located as well as the tooling and the blueprints. I sent him two correct 15x7 trim rings so that he could be certain that he was researching the correct 3" deep trim ring. He told me that he plans on running 1000 polished and 1000 brushed trim rings. He said that if they are a good seller that they would do more. That's only enough for 500 cars, half for the 1970 model and half for 1971. I would think that they would sell very quickly. Good news is the wheels are in motion. In his own words: STAY TUNED!