This space for rent!
Painting all these miniatures is starting to crimp my time...
So...where does one get these cards?If you are lucky, you may receive one from your dealer when you buy the game (some dealers were given certain promos to distribute to customers).
The promo cards were also given out at various (board)gaming conventions, so visitors may have received a few copies.
Winners in GF9's contests for Spartacus also received the promos as prizes.
Last but not least, you can try buying them on eBay and other auction sites from the scalpers at relatively exhorbitant prices.