This might be a silly suggestion, but for stuff like the Arena Battle, which is mostly tracked, could you piece it together from scratch using the tracks from Episode I (and that bit from ROTJ/whatever other material was used), and by using the movie as a guideline. This way there would be no sfx or dialogue. Or has not all the tracked music in the battle been released in it's original form?
This might be a silly suggestion, but for stuff like the Arena Battle, which is mostly tracked, could you piece it together from scratch using the tracks from Episode I (and that bit from ROTJ/whatever other material was used), and by using the movie as a guideline. This way there would be no sfx or dialogue. Or has not all the tracked music in the battle been released in it's original form?