Thank you all for the replies.
The charm of a fine old lock is unbeaten, in the sound, structure and style.
Just keeping the lock plate is a great idea, and installing new lock parts where possible.
A fine old barrel, with a brand new strong liner is the better way to go for sure.
Even capturing the look and feel of original hardware, like trigger guard, and butt plate.
The theory here is not to save a dime, but to capture the look of metal 100+ years old, and also to confuse students of the art of gunmaking in years to come.
Fred