Let me try and clean this up.

The piece the oil filter connects to had a plugged port on it which you tapped into for your oil supply for your turbo.

That was leaking and now the threads are stripped.

Is that correct?

The whole assembly that the oil filter connects to comes off of the block if I recall. You can just replace that and avoid all problems or re thread it but you would spend more buying the correct tools.

Is this a KA?