If I have such a nice vise and did not have the money to replace it, think the cost of having a machine shop machining a new piece might be higher than a new vise, I would check at the local trade school. It could be good practice for the kids learning to run the machines there. I had a friend who was a supervisor of a company and operated large aircraft, he had a spindle built for me with left hand metric threads. I ask if it was a challenge, he replied not really they are just that good.