I wrote a blog post earlier after coming across a guy in another forum who was looking to sell some 444 cell modules from a low-mileage Tesla Model S Pack.
In the process, I found some posts by his partner in yet another forum, starting back before they had tracked down a pack to buy. As it turns out, he plans to break down some of the modules and sell the cells, either individually, or spot welded for packs for a decent price.
I don’t think anyone who knows exactly what kinds of cells these are are talking, but they are definitely ~3,200 mAh Panasonic NCR18650s of some sort.