Sharky's in Devenport can do it on a Willards machine. I've had several done there & they were perfectly fine. Tip selection may be limited.
If you must have it done on a lathe, you best try Pat Diveney's shop in West Liberty (45minutes away). Pat's done several for me over the years too. Tip selection is nearly unlimited.
I've heard that someone has a mini lathe in the QCA. They do tips for a lot of people in the area, but I've never used them. Maybe Terry at Sharky's can point you to them if you don't want to drive to Pat's shop.