I'm on 13B rooted with many changes. My G4 will be replaced on Thursday

I want to make the NEW G4 EXACTLY as my defective G4. How do I make a KDZ or TOT of the image on my existing defective (microphone only) G4? That way I could just use the LGUP tool and make the new phone identical to what I have now. It's a brand new replacement so I think it won't have the latest software.

I just want it to be a clone of my existing (defective microphone) G4 VS986. How can I extract the KDZ from my existing phone? It would save me HOURS of work.

Thanks much,
-Joe