Hi

just wanted to mention that my son had OT for his sensory integration dysfunction and it was really helpful, so I hope you manage to find a qualified therapist. Once you know certain techniques, you can do them at home with your child.

One that was really good for my son was soft brushing
Buy a really soft brush and either you or your child frequently brush arms from the hand toward the shoulder and same with legs and also back. It really helps!
We also have one of those wooden roly poly things for back massage, except my son puts it on the floor and then rolls it under his feet while he is seated at his desk etc.

there is an excellent book on SID by Carol Stock Kranowitz called "The Out of Sync Child"
here is her website
http://www.out-of-sync-child.com/