This app was mentioned in 5 comments, with an average of 2.00 upvotes
Just chucking this out there: Narrative Sabacc rules from Under a black sun p27 link
Play Pazaak online link
More Sabacc rules, this time with actual mechanics and cards to print out: link
Sabacc app for android link also available for iOS I think.
Overall if you are trying for a Casino Royale style set piece, I would mostly go for narrative rules rather than actually play the game unless you or your PCs are really keen on blackjack, poker etc. In this sense the FFG rules for Sabacc work just as well for Pazaak. Some way of keeping track of the amount being bid and possibly using big bids as mechanical ways to intimidate or bluff for bonuses It's more about the use of perception, skulduggery, cool and other social skills than it is about the mechanics. (Arguably true for real card games too!)
There are a couple out there.
https://play.google.com/store/apps/details?id=com.gamegurus.sabacc
There is for mobile.
https://play.google.com/store/apps/details?id=com.gamegurus.sabacc
There is actually already an online Sabacc Tutorial, using Imperial Military Expedition rules: https://www.youtube.com/watch?v=-hXL01OgtoQ
There is also an app released on iOS and Android:
https://itunes.apple.com/us/app/sabacc/id1105884765?ls=1&mt=8
https://play.google.com/store/apps/details?id=com.gamegurus.sabacc