How much is a new barrel or are they even sold?
New barrel already chambered, crowned and profiled for the rifle, or a new custom barrel which you can fit to your new stock?
New barrels are indeed sold. There are new barrel blanks, which have to be profiled by a gunsmith from a straight profile (about 1.250” in diameter from end to end) to your taper and length. There are custom barrels that come with a pre-set contour according to the barrel makers’ contour charts, etc.
How much are you looking to spend, if I might ask?