THAI Ingredients in Manhattan
They've been doing some shopping guides for ingredients specific to various cuisines:
Where to Buy Thai Ingredients
Where To Buy Italian Ingredients
What MMRuth said. Call ahead if you want to make sure you can get specific items.
Thai groceries in Manhattan
Does anyone know where to find Thai Chilies in manhattan?
Kaffir Lime - where to get
http://chowhound.chow.com/topics/4765... <--great round up of different grocers from 2008
There are two Thai markets in Chinatown - you can find them on this list of mine:
My preference is for the one on Mosco Street, as it is cheaper. I have bought Kaffir lime leaves at both of them, though they don't always have them.
The Vietnamese market, and Kam Man also carry some Thai ingredients.
200 Canal St, New York, NY 10013