I once found the card in what appeared to be some kind of barraks in Cathalon city. However i got caught -.- cuz someone i didn't see saw me. and instead of paying the 10,000 fine ((i think it's 30,000 now
)) I reloaded and discovered the card was no longer in the cubord that it was in from the previous save after i re-unlocked it :/
Edit: ok this post had me searching for that damned card nearly all day lol kept teleporting between kolorin, thurbakin and the capital city speaking with their society guild shops, not one had the card and i don't know the locations of other society guild shop sellers :/
Edit 2: Ahahaha I got 2 today
1 dropped from an orc near where u kill White Head the other was sold by one of the Society Guild Shops just outside Quindar Teleport <3