[Misfit]

You can order them from courtesyparts, but they are expensive.

Not sure if the lugnuts are the same for all trims, but these are what fits my 05 XE.

Nissan Parts, NISMO and Nissan Accessories - Courtesyparts.com

 

[bestatchess]

The ones that came on my 2004 w/ the offroad wheels are 12 mm x 1.25

Courtesy Parts used to sell new takeoff OEM nuts for a reduced price, I dunno if they still have those or not. I have seen some Gorilla lugnuts which look pretty decent. My wife came home from the tire shop with some POS splined lugnuts after buying wheels and snow tires for her Highlander. I dunno what brand they are, but they are the worst, cheesiest garbage I have ever seen. So it is apparently possible to buy complete crap if you are not careful.

Titan Lug Nuts and Wheel Accessories