Due to space limitations on the server, I have taken down the Sonic CD 920 Pre-Release MP3s. However, they are exactly the same as the Japanese MP3s. So, I have created a small batch file that renames all of the Japanese MP3s to the 920 Pre-Release filenames. To use this batch file, simply copy the Japanese MP3s to another folder (for the 920 version), and run this batch file in that folder. All of the Japanese filenames (scd_jpn_??.mp3) will be renamed to the 920 Pre-Release filenames (scd_920_??.mp3).
Download Sonic CD Japanese to 920 Pre-Release MP3 Renaming Program