I actually have 4 decks of cards I've put out that have my art on them. Series 2 and 3 also had 20 (total) guest artists who helped with the artwork.

This image is from my current series, Series 1 Enhanced Edition, which was a complete re-draw of all 54 images (52 cards, 2 Jokers) from the original Series 1 set.

They are, in fact, available for purchase online as a physical hold-in-your-hand for actual real deck of playing cards each with a unique image and character on them. I'm still in the process of setting up an online store for them, I'll link them when they're ready for sale.

This is the most popular image from the deck. And a good example of my work-safe art. :)