I am not sure where you are located, but we purchased some at our local Whole Foods. It is a high-end grocery store (not one I normally shop
) that also has a lot of natural based items as well. I figured that they must carry it and sure enough they did. We purchased the last 4 bottles.
In any case, that happened to be the first place we checked, but we were basically going to check REI, health food stores, or other outdoor related stores.
Hope this helps!