Every once in a while, I need dry ice, and usually, have no idea where to procure such a thing. Yesterday, however, I discovered the Alameda Ice Block, at 660 S. Alameda (downtown), 213-683-1640. Open seven days a week (yes, even Sunday), from 6 a.m. to 5 p.m. Dry Ice is 80¢ a pound, with a ten pound minimum. Next time you need to keep a cooler really cold, or cold and dry, or you need to ship frozen food, you'll know where to go. Presumably they have regular ice too, but so does every gas station in the city.