You'll never be able to try that soda, unless you buy VAULT! soda. The formula's not identical, but it tastes basically the same.
Coke was sued by a mom 'n pop diner in Arkansas that had an old jerk fountain. They coined the name and the taste of Surge and a Coke rep stole the idea and tried to patent it without knowing it had already been patented by the owners of the diner.