[k31]

in short my barrel is shooting fliers and i cant seem to find any one who can re crown it but plenty of shops rebarrel so i guess i simply want an accurate rifle and a new barrel sounds like it should do the trick and a .308 is lots easier to get a hold of
i would like to find a bull barrel for my k31 in a 7.5x55 maybe in a .308 (i think they should be very similar) and hopefully not to pricey maybe about 200 at the most
i cant find a standard k31 barrel and am not sure what i would need to do to convert it into a .308 i have heard of it being done but am not sure what all is involved