It doesn't matter if the production of CABAL has stopped all together in North America. ESTsoft has baught the rights to the game. And unless they sell those rights, the are legally the only company which can publish the game in North America. Asiasoft only hold rights over the software itself. They have no say/control/benefit from the publishing of the game outside of their region.
*Edit* I looked into it a bit more, and Asiasoft is not the developer of the game. They are just another publishing company like Aeria games and hold the rights to publish Cabal in Thailand, Malaysia, Vietnam, and Singapore. ESTsoft is actually the Korean company which developed the game itself. So I was wrong about them selling the writes to another company, though they took it apon themselves to publish the game in North America. Do you have a link/literature of them looking for a new publishing company to take on Cabal?