As you say, many of the amps are Korean girls (I love Korean girls by the way...), but it is easy to find Chinese & Thai girls in DFW.
You will find lots of Thai sweeties at places like Blue Angel, MoonNight, Cleopatra, & Aloha. Plus a few at some of the other spas on Emerald.
Chinese girls tend to be found primarily at the suburban spas. Those spas tend to be Massage + Happy Ending (L1), but if you do your homework you will move up to extra services with patience.
I found one of my all time favorite girls (young, spinner, beautiful) at a suburban massage spa some years ago. On my 3rd or 4th visit, as I was leaving, she kissed me and whispered in my ear "if you tip me 100 next time we can do everything". I must have seen her a million times until she retired - to get married. Believe it or not, she owns a liquor store now.
So, with some patience, you can find whatever you are looking for.
SL