yeah, ford spare parts only sell that whole assembly in the link in my first post in this thread... you can get aftermarket replacement lines that go from the bottom of the reservoir/pump to the steering rack, without replacing the other half of the line, which was what I did last time I had this power steering leak... I've never seen people replace just the o-ring and have it be successful in the stock line; but I believe there's an aftermarket line that allows you to service the o-ring successfully, I just don't have the details on hand.