Any reasonably competent gunsmith should be able to rebarrel a Model 1917. Gun Parts Corp. lists white, pre-threaded barrels with the military contour at $104; it is always better to go with pre-threaded if possible as it cuts installation cost considerably.
I will note (because certainly some one else will) that Eddystones have a reputation for developing receiver cracks during barrel removal, so it is a good idea to relieve the barrel shoulder, which means that the old barrel is not usable any longer.
Jim
