I have a couple of 700s at the smiths being taken apart now.
SS 204 sporter contour
Blued 22-250 varmint
Your smith can screw yours off and reinstall another, headspace and your good to fire. Under 1 hour of work, should not cost $50. Stamping on bbl likely won't line up like from factory.
Both were low round guns and bores looked good, but I'll clean them and know for sure.
Either of my bbls would be under $100.
Let me know.