Install a good sturdy die grinder to your lathe compound tool holder and grind your live center cone to near perfection.
I've thought about that. I have an electric die grinder as well as a Dremel. I wasn't sure whether a die grinder would hold tolerances well enough to grind an accurate center. I may give it a shot.
Meanwhile, I think I'll try to find the right Miller Machine (there are like a thousand of them) and get a couple ground for me.
Thanks for the responses.