There is absolutely no need to buy all new a/c lines. These are easily and economically rebuilt by your local auto a/c shop. They simply take off the rubber hoses and replace them. They have a special crimping machine to do this with.

To replace them is very expensive. In almost every single case a leaking line is due to deteriorated rubber hose.

If you don't have a local auto a/c shop there are plenty of them that you could UPS your lines to and they will come back as good as new. I know a very good and trustworthy shop in the Dallas area that is very reasonably priced.

Good luck,