The artwork is from Season 4 of Missions, it's the same contact art we use. The NERPS "N" logo was pulled from the old SR TCG.
The cards themselves were put together by Patrick "Squinky" Sullivan.
As for how to get more... Go to Dragon*Con and play Missions there?
(Seriously, once the con season is over, I'm looking into getting the card "sheets" posted up for folks to download and print off their own if they like)
Bull