I know people have found it at Autozone and possibly some of the Walmart stores carry it.
If you do a search you will find threads that show the front and back sides of the bottle. It also must say Made in Germany on the lower left side of the back. It also must say that it meets ACEA A3 spec on the back of the bottle.
My question on this subject is if this product is here to stay or if it is a substitute while Castrol USA starts processing this new European Formula here?