All I can think of to say is "I thought all you fellers had died off ".
I was faced with a similar problem more than 30 years ago and couldn't find a soul to pour lead. Had a few say they knew how but no longer had the tools (plumbers are known for that). Homeowner wanted to preserve the home true to it's period and was paying well for all the work being done to it. My job was was assisting owner in writing scopes of work and making certain they were followed. One of the contractors used scab labor on demo work that wound up damaging a lead sleeve between flange and cast iron. Realy straightfoward replacement of lead sleeve but noone would pour the joint. In my search for a plumber I asked at a supply house. The guy just laughed,went to the back and returned with a lead "repair"sleeve and two big ol soldering irons resembleing medieval war clubs. He gave me a few instructions and sent me on my way. I made my first and last lead repair plus a rock solid,long standing business relationship with the supply house owner. The story wouldn't be complete unless I confessed to my price couging. The contractor who damaged the thing said he would pay to have it repaired but refused to beat the brush for a plumber and pay him up front. I was on the homeowner's payroll during all the time I spent (this was long before cells and the vacant house had no phone) but I felt I was awol while away from the site. Right or wrong,I stuck the contractor with a bill I intended him to remember when he thought about cutting corners on labor or shirking responsibility of follow through.
Anyhow,I hope you made a u-tube of the deed because many people may never see lead poured.