There's a lot of used ones on eBay.
If you want a new one, Google: "Winchester, stock, long action or LA", you'll get a zillion hits.
Yes, the Deluxe Model
The Stock may be made out of wood or plastic. The Lock, Bolt, Barrel, and Trigger are all made of steel, or aluminum.
What is your question?
Lever action, blued steel, wood stock, most likely chambered in 30/30
6 too 700
Good collector's rifle value $70 - $150 USD in 2012. No major damage to wood stock and most bluing on metal intact.
$250.00 to $350.00 depending on stock (wood or composite) the model also makes a difference and if there is iron sights and/or a scope.
500 or so
You could try Numrich gun parts corp.
100 USD or so
10-100 USD. Yes, any of the major wood shops should be able to make one.
The fore stock should pull directly down from the barrel if you grasp near the front. the butt stock is held in place by a long screw or bolt that can be located by removing the butt plate or recoil pad. Take off the butt plate. Use a long blade, hollow ground flate blade screwdriver to loosen the screw that holds the stock to the receiver. Be careful to not slip and crack the wood.