If it was the phoshpated Ariel we are speaking of, yes that stuff is hard to find and for a good reason. NYS and others states have banned all phosphates from laundry products, even commercial ones. Stores can get into trouble if the EPA is tipped off. Being as all this may, K-Sears had agood stock of Mexican detergents last time I checked. The usual suspects, Foca, Roma, Ariel etc; not sure if any contained phosphates though.
The above ban is why many products that contained phosphates but just weren't sold/shipped to various states have simply been withdrawn from the market. Amway's "Smashing White" was the latest example.
As for the Amercian Ariel that appeared in the States briefly awhile back, can't say I miss the stuff. Damn scent gave me migraines. Even when encased in two thick bin liners, the scent wafted through the house. Finally chucked the lot into the rubbish.