The January-March 2018 issue of Engine Professional Magazine from AERA included an excellent article about Thread Repair. If you haven't read it, take some time to do so. You can find it on their website or follow this link.
The article includes a section on the Full-Torque spark plug thread repair system, specifically referencing P/N FT-514LTK. Unfortunately, Goodson doesn't carry this product any longer, but it is still available directly from Full-Torque.
It's always great to be mentioned in an Engine Professional but we want you to be able to find the parts you're looking for so head on over to Full Torque and tell 'em Goodson sent you.