Retro fit kick out flashings for stucco

Can anyone share info or a link to proper kickoff installation in existing stucco where the kick out flashing is not present? New construction detail is readily available. I have only seen a couple youtube videos on it - don’t know if what I saw may be considered an acceptable practice

https://www.nachi.org/kick-out-flashing.htm

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regardless of material the only proper retrofit that i’ve seen and would approve of in a report
is to cut enough material to insert the kickout behind the step flashing & seal the portions that intersect the cladding

Thanks for the replies!