Probably a long shot, but I do recall a few Nissans running around on 5-lug Mustang wheels. I've seen these same wheels on a 350z and they looked pretty good (they'd make for a good spare set for autocross or whatever).

I believe these are 17x8 with a 45mm offset.

These came off of a 2006 GT (I believe these were the optional Premium Package wheels). They are in pretty good shape. One has some curb rash. The others have some wear from removal and installation of the center caps. Complete set of four also come with the caps.

Photo of them cleaned up:


Close up shots are at the following link (kind of dusty):
Wheels pictures by PhocusZX3 - Photobucket

Asking $250 obo