A friend of mine came across the deal of the century on estate M/Ls, 4 of them, all original and mostly in very good shape. I saw three of them, two bench rifles from around 1840 and a rather odd smoothbore with an unusual hooked breech (picture to follow). My friend has a bunch of original rifles and fowlers, all started out in questionable shape but being a good gunsmith he brought them all back to life and shoots them on a regular basis, he doesn't own any closet queens. None of his rifles and fowlers have any collector value, just every day guns. He is wanting to resurrect the fowler but the barrel shows evidence of having flaws filled with some kind of metal filler, small spots, about the diameter of a pencil eraser. To me the barrel looks like an older repurposed military barrel in about 70 cal. It looks like lining the barrel would be the only way to make it shootable again, perhaps turning the 12 into a 16. Anybody know where to buy shotgun liners or people who do this work at a reasonable rate?