This is close (if not the same) to one of the idea in the Revelation Space series from Alastair Reynolds : some people scanned their brains and could "live" through these simulations. At first the process killed the host and lead their simulation dwell into madness after a few decades, but it got better after a century or two and rich people usually saved themselves every few months or so. These are called Alpha simulations, since they're as close as a human mind as possible (as directly scanned from the brain).
But another idea is that a Gamma or even Beta simulation (easily passing the Turing test but not quite attaining "true" consciousness, if it can make sense) is reachable via "simple" 24h/24, 7d/7 recording of the individual's life, successfully understanding its behaviour pattern and mimicking it close enough to simulate what you call a Dividual.
This could be closer to our current state of technology, coupling a permanent video & audio recording of one's actions during a few years, to a more advanced type of deep learning as for today, but with the same technological basis. It wouldn't really be considered as living per se, but it's the closest we can come with today (or a bit later) technology.