Best places to find Thai spices & foods in BR?

I've hit a few Baton Rouge Asian markets recently, and the Thai-specific selection seems pretty lacking compared to what I used to find in Birmingham.

Yes, Birmingham. Alabammer.

What I was hunting this time was Thai fish sauce, which seems to me to be much cleaner and refined vs. the muddy Viet or Korean fish sauce that I saw in the BR markets. I've come to like the Thai stuff for a dipping sauce or to add a little something-something to other foods. Anyone know of an alternate source? Whole Foods or other grocer?