well, If your local, I could offer help, but dont see where you at.

when I did mine, I searched all around, best place I could find was what everyone else was saying. Courtesyparts .

http://www.courtesyparts.com/nissan-timing-belt-kit-2002-2004-xterra-supercharged-p-450.html

FYI, the link is for the kit for my X, which is supercharged, make sure to find your kit.

you buy the whole kit from them and they include everything you will need, except a gasket for the thermostat, and if you try to shop around and compare, you might find you can save about 10 bucks, but everything you get from them is going to be NISSAN PARTS that will fit!
also , I am going to send you a pm that might help you out!