Stock IFS Swap
Check with your local dealers and the one you bought it from, but if you are worried about the warranty, you may be voiding it with any driveline change. Check that first before you even consider the cost of things. Oh, it will be costly.
If you want to go completely stock as from the factory, you'll need everything from the donor vehicle - shafts, trans, tcase, shifter, console, rubber boots, diff, axles, computer, maybe air pump, spindles, knuckles. Not sure how the 06 is mfrd for 4wd, but my 02 has the computer tied so the dash lights up when the air pump engages the slide collar in the diff housing. I mentioned spindle and knuckles because again, I don't know how the 2wd varies from the 4wd version. Many rear wheel drive vehicles have the front spindle integrated with the knuckle. Course, 4wd has a hole in the knuckle for the front axle shaft and most of the time, the spindle is bolted onto the knuckle.
Best thing to do is look at selling it after the winter and probably still at a loss, or to a relative in better settings for its use.