Something similar has helped me in not drinking pop/soda. I just get soda water and add lemons/limes. It has the flavor and fizziness of Sprite, just not the sweetness. And it's pretty widely available.
Best thing I did to quit soda the first time sround was get the True Lemon powder (it is crystallized lemon) and just drink that at water. I always found I would never use actual lemon before it became rotten, but that stuff is super useful.
