Could you spell out a little more detail on what you expect or want on a refurb? Some damaged threads are obvious, but beyond that, what? Do you know what thread it is, meaning is it a common metric or English thread? Knowing what the other end of the screw looks like would also help estimating the machining required. Since there's a nut on the inside, I'd assume that the female threads might be out of service too, but I don't want to assume too much.
And lastly, considering repair time and shipping two ways, even for a small part, have you looked into a simple replacement. Yeah, I hate to throw anything away too, but occasionally it's really the right time.
As an aside, this post probably would be more at home in the general forum than in a machine reconditioning section. It's just a repair job.