The Dot, as far as I can tell is presently only available to the market in Japan via Japanese retailers and several (Japanese) Ebay sellers. But I am sure it will reach the other puzzle and online stores outside Japan pretty soon.

My "beta" puzzle is not the black and silver version presently in the market but sports a brassy and copper steam-punk look instead. Physically (aside from the colour scheme) I don't think there is any difference in the design between my prototype and the production version packaged under Hanayama's Huzzle brand.