Thank you for the information. I still don't know if my employer got the story wrong or not... I was suspecting that the cards that were no longer available were Gemaco, but I haven't seen anything yet to indicate that to be true. Anyway, after reading your response, I am more knowledgeable than I was. Thanks again.
Actually, I did a little more research.
GPI, I hadn't heard much about them since they bought Gemaco - USPC had purchased Gemaco first, but was forced to sell it off to prevent anti-trust proceedings. I just learned that GPI was itself purchased by Angel Group in May of 2019, based out of Kyoto, Japan. Angel's long been a quality maker of playing cards for retail and casino buyers - I own a few of their decks and I like the quality.
Turns out that at some point before the purchase, GPI set up the company's North American headquarters in Las Vegas, but started manufacturing of the cards in a factory in Sonora, on the Mexico side of the US border. I'm not sure at what point or under whose ownership that the US printing operations were shuttered, but they are indeed shuttered, it seems. They're no longer considered a domestic manufacturer.
So if your casino is dedicated to buying from US manufacturers, USPC is the only game in town left, at least for casino-grade decks. When the operation was sold to Cartamundi at the end of 2019, Cartamundi kept all of the US operations intact - both USPC's and their own. In addition to playing cards made in Erlanger, Kentucky, Cartamundi has a board game factory outside of Boston and a customizable card game printer in the Dallas area - last I heard, they're the ones printing all the Magic: the Gathering and Pokemon cards, maybe Yu-Gi-Oh! as well. USPC's print operations aren't expected to move anytime soon - they only opened their current plant in 2009 and it's still pretty close to state-of-the-art. I doubt Cartamundi has any future plans to move their operations - nor their operations in Vitoria, Spain, where USPC subsidiary Heraclio Fournier operates a card printing plant.
As far as Liberty goes, well - they state they do casino-quality cards on their site, but they do far, far more work in the novelty, advertising and gift market; things like custom decks for wedding gifts to guests, that sort of stuff. I'm not the guy who knows all casinos, but to my admittedly-limited knowledge, there aren't any casinos supplied by them with playing cards. I would think if there were, they'd go through the trouble of advertising about it on their web site - and there's not a casino card to be seen. They do a decent job of making custom tuck boxes for some boutique decks, the kind of stuff you find on Kickstarter.
So od. ds are, your casino manager might have been referring to "Gemaco" shutting down their US operations, or they might have been talking about how USPC closed their factory during the pandemic itself, then reopened to a massive backlog of orders and a a supply chain that's tied in knots. No matter how you slice it, there's a shortage of casino-grade cards, especially ones that are pre-shuffled, and it still hasn't squared itself away yet.