In case it wasn't already mentioned, I thought I'd let you in on knowing that you can special order Diatec goods from EliteKeyboards, even if not listed on EliteKeyboards.com
According to Brian in Sales at EliteKeyboards, they make two special order shipments a month, and by contacting them either through email or telephone you can place an order. At least for the keyboards, the prices are the same ($115), and they don't charge extra for the special order!
I was told they can order "most" items from Diatec, in other words from
http://www.diatec.co.jp/shop/index.php.
In case you're wondering, I'm deciding between the FKBN91M/JB and the FKBN91M/NB, which are Tenkeyless Brown MX Cherry keyboards with the Japanese layout. (Speaking of which, besides the Kana lettering, does anyone know if the upper left keys have different functions? On the NB it says E/J which I assume switches between English/Japanese in the IME, and on the other it says 半角 and 全角 which is half/full width; is this correct, and are the other function keys different?)