Not only did they release volume 33 of free styles, but they also have available the complete set of factory styles from the PA3X. I can't imagine another company that follows up with such great ongoing support.
A year or two after releasing the PA4X, they did a tremendous upgrade to that OS, with Version 2, adding many new features, sounds and styles. All free!
Click the link to download the PA3X styles.
http://www.korg.com/download/global/paseries/bonusware/Pa3X_Preload.zip