[Question] Creating a Korean PSN account and purchasing Korean game/DLC digitally.

I'm planning to get a copy of Djmax Respect when it releases on 28th of this month. It'll only be available on the Korean PSN store then, so I plan to purchase it there digitally if possible. I'm not too worried about the registration/verification process, but wondering how I will go through the payment process.

Would my credit card from Malaysia work? If not, using Korean PSN cards should work, right? It looks like many places that sell PSN cards online (like play-asia) do not sell Korean PSN cards. Does anyone know a trustable site that sells Korean PSN cards? Thanks!