Just got two unopened decks of Paulson plastic cards for $1 a pop at the thrift store. This is better than my copag setup find for $3 from last month that had one very slightly warped card.
I'll keep these for if I ever run a home game again, but it looks like someone else had a setup about 10 years ago posted on here...
https://www.pokerchipforum.com/threads/paulson-plastic-cards.7673/