Hands down its Diamond axle. Second would be Ruff Stuff but that housing is more like a 3rd member receptacle than an actual housing. All they supply is something to bolt the 3rd member to you still need to "PRESS" in the knuckle balls and somehow align them properly.
Got news for you: RuffStuff will build your axle just like Diamond does, well the housing atleast (that includes knuckle balls welded on).
If you want a factory spec wide axle regardless of the housing.... a FJ60 uses mini truck outers (knuckles, spindles, etc) with a 58" mounting width, and the FJ80 has larger diameter birfields with a 63" mounting width.
I am running an fj80 front end with aftermarket Hellfire Fab knuckles/ Hysteer under my 85 4runner. I love the stability from the extra width.