They can be found outside of any Ralphs I think. They're called Aquafill. Premium Water. At first I was hesitant because it just says:
"WATER PROCESS: This multi-Step State of the Art water treatment includes micron-prefiltration, Reverse Osmosis seperation, double ultraviolet sterilization, and a post carbon polish.
NUTRITION FACTS: ... Calories 0 Total Fat: 0 Carbs: 0 Protein: 0"
... It didn't mention De-Ionization. But I'm assuming that the "micron-prefiltration" could be it? Not sure. Anyways thats what I use.
Which Ralphs in NoHo?