The iso-disc image of the CinemaDTS CD-ROM discs can be found on the usenet circuit, but one would have to do the work in encoding the .AUD files and syncing them to the 23.975fps video.
You can do some reading on this here:
http://originaltrilogy.com/topic/The-1997-Star-Wars-Special-Edition-Trilogy-Preservation-Standards-Thread-Work-In-Progress/id/14647/page/1