Asian Grocer in Malvern?
This place is really great:
Asian Grocery (610) 524-5898 11 Marchwood Rd, Exton, PA
But my favorite, and the place I make it a point to get there at least twice a month is the H Mart located in Upper Darby, PA. It's about a half hour drive but definitely worth it. They have everything you could ever want, including a great food court and housewares dept. upstairs.