Year ago I was is touch with the following organisations who both offer CD-ROMs.
www.macmillanenglish.com/aviationenglish. Their contact at that time was Charlotte Ellis on
[email protected].
The other contact is Jean Ordonez at Aviation English Training, Boca Raton, Florida 33487. Aviation English Training Proficiency Courses Online (http://www.aviationenglishtraining.com). The email address is jean.ordonez@aviation englishtraining.com.
The American CD certainly had US accents.
Best wishes.