Exedy, like stated above, is who makes Nissan's replacement clutches. Any factory replacement from a dealer would be an Exedy clutch, just re-labeled to say Nissan. I honestly don't see the point in even considering a dealer of any sort when you can get the same thing for $150 or so with shipping. I priced the same parts from my Exedy clutch with Rob and it was almost $400.
http://cgi.ebay.com/ebaymotors/EXEDY-CLUTCH-KIT-85-97-NISSAN-PATHFINDER-PICKUP-3-0-L-/400052471071
I just installed this clutch in my Pathfinder, works great.