Stocks are super easy to replace. Just 2 screws and the entire action and barrel come out in a single piece. There are literally hundreds of replacement stocks available for the Rem 700. Just pick the one you like. As to the barrel, if the bore is still good and it shoots good, why replace it? You can have it cerakoted or even just paint it with rattle can paint to cover the scratches. But if you want to replace the barrel, that's a job best left to a gunsmith. And just like stocks, there are a bunch of replacement barrels available.