Not sure about the US, but in Europe the Iron Kingdom Miniatures seem to be simply not available.
There are some 'residual' pieces on some traders basement, but not the full line.
Models like Draegyn are simply not available. (even not via the offiicial retailers) Even those that are theoreticaly available as Mercs for Warmachine like Lanyssa Ryssyll are hard to come by.
Is this just a momentary situation (maxbe due to the upcomming new release of IK RPG) or is the line discontinued?
I wasn't able to track down some reliable and official information about this.