Quick google found this
'The Xterra and Titan get the D44, Frontier gets the D44 or C200, Armada gets the R230, Pathfinder gets the R200'
Pathfinder
Not seen one of these in the scrapper, and I doubt there gonna be cheap.
An S15 diff or an R200 skyline diff will work, Japandyno flogs these on ebay, sometimes they go cheap.