spitting image / dead spit

[Mnemon]

a. She is the spitting image of her mother.

b. She is the dead spit of her mother.

Hi.
Do they both work for you? Could they be used interchangeably?

 

[5jj]

I use only the first.
Not for me.

 

[SoothingDave]

I have never heard of the second.

 

[Tdol]

It exists: https://www.ldoceonline.com/dictionary/be-the-dead-spit-of-somebody

I have gone through many decades of British English without hearing or reading it, though.