Passover Coke, Pepsi, and Sprite has all but disappeared by now here in NJ... but just recently I stumbled across a HUGE display of KP Dr. Brown's Cream Soda and Black Cherry Soda, in 1L bottles, in the Kosher aisle of my local Shop-Rite!

The bottle says "sugar and/or high fructose corn syrup" in the ingredients, but the cap has the "K-P" logo, whereas other Dr. Brown's sodas I've seen just say "K" on the cap -- so I'm guessing this is the real thing, made with sugar.