Over at the Arctablet News forum: [ ROM ] FNF iFive mini3 (retina version) Android 4.4.2 KitKat custom rooted firmware based on v2.1.0 (2014/03/07)
Please report any problem with this firmware, I can’t verify this custom firmware works as I don’t have an iFive mini3 retina to test it.
And also especially note:
Please register on our site to access files downloads area.
So there’s that too.