Zstore.com has “Ultimate Battle 22” up for pre-order, though clicking through on the link will bring you to a page that does not list the item.

This more or less confirms the release date of 26 March 2003 other sites have been giving for the game domestically. For now, you may be better off ordering the game at ebgames.com, which has it for a mere $19.99.

Thanks to Gregor on alt.fan.dragonball for the tip.