Hi all, I’m so sorry this took me so long. I’m so short of time all personal projects don’t go very far normally and I knew I needed to clean this up before sharing it with anyone.
What I’ve done is now available with some basic documentation here: https://github.com/arkid/ACF-Fiddles/tree/master/ACF%20Repeater%20Copy-Paste
I hope it helps some of you, do share if it does!