If you encounter errors downloading directly to your Vita, you can purchase the game via a PS3 console and transfer the game file using a USB cable and the Content Manager Assistant. Regional Availability and Languages
Select the title to begin background downloading. Do not let the console completely lose power during this process.
Finding a reliable is complicated because the game was never officially released for the Vita in the West. While the PlayStation 3 version reached North American and European shores, the portable Vita version remained exclusive to Japan and parts of Asia. Official Download & Purchase Options