As of right now, the only oriental module is made by Generalmusic and is called the WK2oriental arranger. It was just shown at the NAMM show the last few weeks. It is just like the WK2oriental keyboard but in a box. You can see it on the www.generalmusic.com web site. I'm not sure of the price yet but the keyboard with Hard drive sells for about $1500 so I'm sure the module will be less.
George Kaye