I live 40 miles from Greeneville, Tn. You never hear anything about the company. I would think that if a local company had a contract like that you would hear something about them in the news.
You probably don't hear too much about them because they don't really make products for the consumer market. They make coinage blanks for more than 20 countries (over 300 billion coins so far), zinc strip for other large industries etc. They are now one of the largest zinc product producers in the world. And last year their name changed to Artazn.
Funny all the antique furniture I work in you’d think I’d find something early. A nice draped bust half dime in an 18th c desk maybe lol. Nope. The occasional wheat or memorial cent is about it best I ever found was an ihc in a safe interior I was pulling out Late date and average grade. I think it was a vf 1898