A parts dismantler like Pick and Pull would be your best bet, look them up online at
www.picknpull.com and see if there is a store near you if you aren't familiar with them. They've changed things up and now post up online what vehicles they have in their yard and how much it costs for the part you're looking for. $27.98 out the door for a control arm here locally and there are 3 in the yard. I was just there yesterday and noticed there were a few pathfinders too. They don't differentiate between 2wd and 4wd online sadly but it's worth going and checking out. $2 bux at the door for insurance seems the norm, yet parts are 3x less than the "have them pull it for you" dismantler across the street. Oh and their return policy is great too. Hope this helps.
I'm SASing my rig because the truck was in a wreck at one point (or someone just bombed the heck out of it) and my lca's are crap otherwise I'd send you mine =(