You might want to look at this. It's the same seller I bought mine off. Fine job he does. Just ask for a shipping quote before you bid if you decide to go this way. Specs on what will and won't fit are on his ad!
You'll need your pitman arm and the rear half of the clamp that locks the box around the beam. Oh and you'd probably go out and buy some new bolts to make it all look neato.
http://www.ebay.com/itm/141382362564
I had the option of buying new TRW box but personally I like the OG ones if they've been properly overhauled.
If the link dies then just search for seller bkkaug03