Any shop in Seoul selling Thai dramas?

Hello :) 

I fell in love with Thai dramas this summer, and since I will be in Korea next month, I'm looking for a shop selling Thai dramas official DVDs (and some goodies). I don't know anyone in Thailand who could help me, and on Internet there is not much choice and the prices are insane, so Korea is my last hope since I'm not going to Thailand anytime soon.

I hope someone can help me, thanks a lot!