I was going to suggest Don Ferguson as a contact and I see you've already had some communication with him. He's an awesome and friendly windsurfer who knows lots of people. I'm in Elk Rapids north of Traverse City but see Don in Hatteras sometimes. Tell him hello from me if you talk!
Also check out ABKboardsports.com. I attend their camps in Hatteras and that is where I learned to windsurf, what equipment to purchase, how to rig....and met awesome friends. I've gone to at least one camp a year for past 5 years and plan to go again in October.
Welcome to MI Windsurfing Matt. I don't have extra boom but I wanted to suggest you find a windsurfer in your area that could help with your questions. Hangout at a windsurfing launch on a windy day and you're likely to find lots of helpful advice and maybe someone who has an extra boom the'd sell you!