Thank you for posting this question, flannejp. I want to begin by saying that I am not a therapist.  This means that I am not in a position to give individual therapeutic advice.

I am not aware of any DVDs that I could recommend from personal knowledge. Others who are subscribed here may know more than I.

There are exercises that may be useful to your son, although the best support would be to contact a eurythmy therapist directly. Have you contacted the US based Association for Therapeutic Eurythmy? I would not assume that there is nobody nearby until proven otherwise.

If you draw a blank, and no-one is willing to correspond privately with you, please email me through my contact page on this site, and tell me more about your son. I am living in a curative education community and may be able to offer some general suggestions in collaboration with experienced colleagues here. On principle, I do not discuss details of an individual situation in a public forum.

I would certainly recommend that you investigate Sensory Integration and Brain Gym on the internet. These are used in my community with positive results. There are some good and practical books available for parents, and I will post some suggestions here soon. I hope that others who read your post here may be able to offer you more.