making your own would probably be really easy. just take some ginger and boil it with some sugar until you have a really gingery syrup, then add sparkling water. once you discover ratios you like you can make a ton of syrup at once. (this is how l and i always have ginger lemondae in the house.) you could also pick up a bottle of ginger syrup and mix it with whatever is your fancy. whole foods and hharvest should both have this in their herbs and supplements sections.