If you want to do it yourself, get a 1/4 x32 helicoil kit. Its expensive but it works.
Do you have a part number and source? I've spent days looking for this somewhat obsolete thread in a HELIcoil. I've found it in a REcoil and they work well but I'd still be interested in seeing it in a HeliCoil. I've heard of the 1/4x32 HeliCoil but am beginning to think it's like Sasquatch. It's turned into a quest to find them!
Bill Vail