EthaiCD. From what I heard, shopping there is pretty smooth and the target of this shop is mostly Thai people living outside of Thailand.
NOTE: I don't know the people from this shop, and I don't buy any music from them (still I buy about 50 Thai records of all kinds every months from many local shops and sellers).
Of course not everything is "black or white" and there are quite a few very interesting albums that have been produced for the occidental market that are worth buying. I will soon make list of some of those records made by professional ethno-musicologists and passionate people involved in the preservation of the musical traditions. Those albums are available at your local record store, they are very nice and usually have a pedagogical point of view. If the local scene deserve support, those people deserve respect too!