In addition to what scott585 said, you`ll need the little parts too, fore end stud & spring, rear nose cap nut & screw, front nose cap screw. when you get a new fore end, strip all the metal pieces from your sportered fore end, look in all the holes for hidden washers, and any other little bit you see. if you throw them out or don`t realize that those are there, it`ll cost more money. you can get walnut replacement wood from Numrich, extortion on the shipping. but if you want coachwood (Lithgow used this wood), maybe some one from NZ or OZ can help you out there. liberty tree has stuff too, and lots of guys here can help with parts and advice.
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