Can you build a whole car from aftermarket repop parts?

I found myself staring at my office wall today and started thinking to myself about all the research and parts trolling I've been doing. So I got to wondering if, since so many parts of our cars are available as aftermarket repop parts, whether a full car could be built entirely out of those parts. Seems that I can do an entire body and frame from AMD alone, for instance.

Just one of those things that make you go hmmmm. But I think it's actually doable. 2016 A-body anyone?

Thoughts? What parts can't be found being remanufactured now?