Beetle spark plug insert - Help

[tinusvdb]

I am building an engine to get my beetle on the road, but one of my heads requires an insert for
one of the spark plugs. It is already tapped bigger.

Anybody in Benoni possibly have one lying around?

 

[Exploratio]

 

[tinusvdb]

 

[tinusvdb]

 

[Jughead]

 

[CliveG]

 

[tinusvdb]