Can one retrofit the folding seats?

For those who don't know, the folding rear seat with the pass-through was an option, not standard equipment. Yes, even a Yugo had folding seats as delivered, but ya know -- Italians love the green $$$

In any case, my almost-perfect 2016 T does not have the pass-through. I figured the time to start gathering parts is while the cars aren't terribly old, and can still be found in the breakers.

Does anyone have technical manuals or similar, or have very good photos of how this system works? I'm trying to figure out what parts I would need. It was an option, so it's possible -- right?

 

There is a pretty detailed diagram on Scuderia Car Parts showing the seat backs, hinges, etc. They might be of some help for guidance with part numbers for hinged seats vs. standard seats. Would be interesting to see if you have the trunk pass through.