Are there supplements to help with hyperactivity?

No. Supplements may cause hyperactivity. Some herbals contain barbiturate like chemicals that sedate people. Most herbal medications are more dangerous than the medications used to treat adhd properly. There was a recent report that omega-3 fish oils may impact adhd positively, but the effect was tiny.
Yes. First understand where the hyperactivity is coming from. Dietary changes can impact it a lot. I would encourage you to see a practitioner that can guide you to the right ones for you. A naturopath can help as can a chinese medicine practitioner, a homeopath, and your physician as well. You may also be pleasantly surprised at how eliminating dairy and gluten can improve symptoms. Worth a trial.