I purchased mine from Right Stuff Detailing. I am very happy with them. At the time the OE steel lines were not in stock, so they sold me stainless lines for the same price. They seem like good people.
I hear you get a price break at Canada Line and Tube for the Buicks if you mention V8Buick. Like 15% off. I think they ship from the US. Its worth a callo No: