I would use the original cut barrels, have them sleeved by Kirk Merrington in Texas or by someone who does that kind of work in the UK. I would try to find a Parker rib from a set of damaged barrels so the rib, although not original to the gun, would be a Parker rib. A set of barrels from another gun would always be "non original" just like the sleeved barrels, and would not have original serial numbers or the perfect fit of the cut barrels. You should post the serial number of the gun so that the original configuration of the gun can be determined and maybe someone on this site can give you some assistance. Bill Murphy