http://www.aph.org/products/index.html
Also, let me just say that American slates/stylus are not nearly as cool as Japanese ones which come in nice sturdy plastic in a variety of colors (I know that is totally vain, but, well, I got pink^^)
So all you in Japan, take advantage of the cooler Braille stuffs!
On another note, I am having doubts about school right now...In addition to other things. Maybe I am just tired, but...