The dealership's computer was finally updated, and I was called to bring my Z in. They had apparently upgraded the software on it and were able to read a 2012 TPMS sensor on a Z they had on the lot.
Sure enough, it took about 5 minutes to read all four sensors and download them into the Car's Computer. The car accepted the sensors and my TPMS light is now gone from my Dash...
Happy Days are here again...!