Can anyone tell me where I can purchase the true American Syllabus video tapes/DVDs?

I'm an intermediate ballroom dancer taking private lessons. Although I have studied from a number of Dance Vision tapes, my private instructor has warned me that DV features their own versions of the American Syllabus and not those that follow the NDC standards. If this is the case, where can I purchase instruction videos from reputable places that is the true American Syllabus.

Although I don't plan on competing I want to make sure that the videos I purchase are common moves that most dancers learn, especially in the Silver level, i.e. Triple Twinkle, Oversway, etc.

Anyone have any incite and/or suggestions?

The USISTD videos are probably a closer match for the NDCA syllabus. Regardless though, the word of the day is flexibility. Figures you cannot lead to someone who has not learned those specific version probably do not belong outside of routine based competition.