Tokyu Hands should have a few also
https://hands.net/cate/interior/furniture/legless/
(The tiny triangle and the one that looks like a little ironing board are devices for letting you kneel on the floor more comfortably - the triangle is very portable, you pop one of the edges between your ankles and sit on the flat surface on the top. Stops you from squashing your calves and feet with your bottom. Particularly useful for funerals and memorial services where formality is required over extended periods.)