It sounds like you may have a rifle that was cut down to carbine length and sporterized. Did the barrel always have a 1903 front sight? What is the length of the barrel as measured from the muzzle to the closed bolt face? anything other than exactly 22 inches is suspect.
If the butt of the stock was shortened to add a rubber recoil pad, you might as well leave it. Grafting a new fore-stock is one thing, but grafting on a new butt section is another thing entirely. Replacement stocks are available from Boyds, but beware... some have reported receiving a stock that resembled being roughed out with a chainsaw, and requiring extensive work to get a proper fit. Also, carbine and rifle stocks do show up on EBay from time to time.
Pictures of what you have will definitely help us give better advice, however.
Hope this helps...
"I was home... What happened? What the Hell Happened?" - MM1 Jacob Holman, USS San Pablo