No those pictures are not what I'm talking about. Those have been around forever and work fine if the cylinder head is off already. I'm assuming you want the easy fix and you don't want to take the head off. I did so looking around and snap-on has it too. I know NAPA has it in their catalog cause I bought mine there. Anyways, it's called a back-tap metric thread restorer. I've been around a long time this is your best option.
Here's the link:


http://buy1.snapon.com/catalog/pro_d...re&dir=catalog

I used mine on an old chain saw I found on a curb someone threw out. It was decent looking so I took it to the shop and tried to run a compresson check. The spark plug fell out on the first turn on the socket. I seen the threads and knew right away why they threw it away. I used my thread restorer and cleaned up the old plug and it went in fine and sealed fine. I primed the thing and it fired right up. I'm sort of a junk anything with an engine collector.