I got mine through Autozone. (They were RARE PARTS kits) NAPA did have them, but they were were more expensive. One thing you should ask about is the king pin diameter. Some of the places sold kinpins that were .861" in diameter versus .8660 - .8665" that was factory stock (or so they say).

Always get a 2nd opinion, especially if I am the source of the 1st opinion.