I've had trouble finding one source for all of my grains needs in NYC, as well as a source that has consistently fresh (WITH NO BUGS) grains. I'm particularly interested in oats (several kinds - groats, steel cut, rolled, oat flour), quinoa (red, regular), buckwheat (kasha and flour), rice (whole and flour, brown and white), cornmeal (coarse and fine) and other stuff too!
Have you found a good mail order source? (NYC non-mail sources also welcome!) I recently ordered from Paul's Grains in Iowa, which I've been very happy with, but the shipping is pricey!