In 2001 I got two Alex Henry rifles from the 1890's that had never been finished though I was lucky they both retained their major components. Replacing locks is a real headache though I'm sure it's feasible. I wrote about finishing my rifles in the spring issue, 2003, issue of DGJ. A year or so ago I heard of another unfinished rifle surfacing in Oregon. Perhaps that's what Steve Nelson is involved with now. Maybe some currently available back-action locks could be made to work, perhaps with lockplates made to fit the existing inletting. Over the years I've heard stories of unfinished British guns of many types but never read an explanation of how they came about. As expensive as good, original rifles are today, it makes sense to finish ones like this if at all possible. Good Luck.