Welcome to the forums Razor-71!
The Thunderbirds are part of the Air Force/military and not in the commercial industry. If you want to purchase "official" air show merchandise, Flightline America sells hats, jackets, coins, patches, and prints etc. You can buy online or visit many of the air shows around the country at their vendor booth. The owners, Mr. and Mrs. Cooney are great people and I'm sure can help you find a lot of what it sounds you're looking for. Here's the website:
http://www.flightlineamerica.com/
Also try searching eBay or Amazon for Thunderbird merchandise. Just search for "USAF Thunderbirds" or "Air Force Thunderbirds" (otherwise you'll get a lot of memorabilia from the old TV series called 'Thunderbirds'). Also be sure to check out the
Thunderbird DVD and book recommendations.
Unfortunately, we're out of Virtual Thunderbird posters and stickers, but if you want I can send you a high resolution image that you can take to a local print shop and have a full size poster made.