I have a couple or now maybe just one setup of 100% plastic cellulose acetate Hoyle cards that I bought years ago as new old stock. They never warped and on the ones I have the back design is very cool. Unfortunately to me and our players they are quite thin and don't shuffle the greatest, plus mine are standard index. Anyway I can't wholeheartedly recommend them but for those who are curious these do not come up very often. Here are a couple examples from a current seller.
https://www.ebay.com/itm/1974912831...X7NEW4&hash=item2dfb65d4ae:g:gYcAAeSw7H9oZKWc
https://www.ebay.com/itm/1974941772...56PPR8&hash=item2dfb91fdc8:g:sWYAAeSwZRtoZfYq
(These are actually 100% plastic despite description)
https://www.ebay.com/itm/1974912831...X7NEW4&hash=item2dfb65d4ae:g:gYcAAeSw7H9oZKWc
https://www.ebay.com/itm/1974941772...56PPR8&hash=item2dfb91fdc8:g:sWYAAeSwZRtoZfYq
(These are actually 100% plastic despite description)