Hey, so I spotted a guy wearing this patch (pictured below) and asked him about it. Turns out it's a nationwide fundraiser for 9-11 related charities and foundations. I'm seeing if there's any interest in doing a large order, he said he'd be able to perhaps swing something if there was enough interest. Cost is listed at $4.50.
Here's the four different patches they have:
Here's the website: http://www.9-11patchproject.org/