I feel this pain. I lost the 9 of spades from a deck of Green Monarchs the same day I opened them. I replaced it with one of the Ad cards that came with the deck, and now I'm less scared to do a signed card routine with another Monarch deck knowing Inhave the backup.
I don't own Steampunks, but if they have an Ad card with the back design on a side, that could work as another option. I've definitely used a joker too for sure, but I know what it's
Iike to lose a card for sure! Good luck!