RE: Where do I find Shasta soda???
There is no one bottling them in NYC, but I have seen them from time to time at Dollar Tree, both in 2 liter size and 2/$1 cold in the soda refrigerators in front of the store. I do remember reading Hayward, CA on the label which led me to this from Superpages:
Shasta Beverages, Inc.
26901 Industrial Boulevard, Hayward, CA 94545
(510) 783-8681 (fax)
(800) 326-8640 (toll-free)
There was only a limited selection of flavors at Dollar Tree. Good luck!