>>5413248No full kits that I know of, but Cobaanii makes tons of smaller kits that can be pieced together. For example, right now, this is up for preorder. It comes with the table, both zabuton chairs, and two Tatami mats.
I'm planning on doing it from scratch mostly, and after the shoji, I need to decide if I want to use Pinktank's plastic tatami mats or make my own. I'll post results as I go if you want.