It's about 50-50 at Harris Teeter and Giant. It's in every Hispanic market I've been in.

I've seen it at Harris Teeter, either in the exotic food section or near the potatoes, can't remember.
You will certainly find it at Whole Foods, H-Mart, Korean Korner or Hispanic markets.

I've found it at our Safeway in Arlington.

I've bought it at Giant, Fresh Market, and Wegmann's. It's probably at HT, too.

I have not really looked for it, but can I find it in my regular Harris teeter? Do I need to go to a specialty store?