You could try,
Robert A. Hoyt @
Freischutz Shop
700 Fairfield Station Rd.
Fairfield, PA. 17320 #717-642-6696
He will need everything, including the cartridge cal. and bore dia. you want, rate of twist, barrel, receiver and bolt/breech block, to get the head spacing correct.
He can make "new" barrels and install them too.
I would suggest calling him in the morning or in the late afternoon... when he starts working, he wont answer the phone.
Last I heard he was running 1 and 1/2 years back logged.
I hope your not in a hurry!
As an altrernative, have you considered lapping the bore? You might be surprised what you end up with.
Blair