Here is the contract for the Curio Card erc1155 wrapper used with OpenSea released in 2021
Here is a list of the Curio Card card smart contracts from 2017
Card 1
Card 2
Card 3
Card 4
Card 5
Card 6
Card 7
Card 8
Card 9
Card 10
Card 11
Card 12
Card 13
Card 14
Card 15
Card 16
Card 17
Card 18
Card 19
Card 20
Card 21
Card 22
Card 23
Card 24
Card 25
Card 26
Card 27
Card 28
Card 29
Card 30