Shopping for Octagon Laundry Soap in Phoenix

I recently heard about Colgate Octagon all-purpose laundry bar soap. It sounds very close to my grandma's favorite, Fels Naptha. I still have some of her Fels, but I'd like to try Octagon. I checked out Colgate's website and they don't even mention that they make it anymore. At the least, I would think there might be a, "find in your local store" kind of click-on. Is there somewhere in the Phoenix area I can buy it or am I stuck with ordering online only (e.g. at Amazon, etc.)?

By Terri T.