Phozon was indeed Japan only and was a kit-only (or, at least, it was only available in Namco's generic cocktail cab, I'm not sure if it was JUST a kit or if they did some full sales with the kit already installed) game. Even in Namco Museum Vol. 3 where you can look at the cab it's just a generic Japanese Namco cocktail with the kit installed. A lot of games after 82-83 or so in Japan were released as kit only due to the popularity of candy cabs the generic cocktail cabs they sold (just swap the art and you're good to go!). I've seen a couple of boards pop up on Yahoo! Japan Auctions, if you're after a kit I'd keep an eye out. Phozon is an awesome game, it's sad how underrated it is, even in Japan...