I have no idea if Thailand has any card shops, you would think they wouldn't since basketball is not big over there and the overall culture does not value collecting trading cards. But I could be wrong.
Probably cheaper looking to get what you want over the internet or from a local agent such as @cherrycollectables than flying to Jakarta to look for a shop!
Hi, I'm from Bangkok now I live in Sydney. Back in 10-15 years ago there were some sport cards shop around and it was more expensive but now all the card shops only sell Magic or Yugi card only. I have to buy online while I was in Thailand and not many Thai people collecting basketball card excepted me lol