I've created a Cafepress shop to sell Social Security themed merchandise. Mostly, this is Social Security Administration logo items such as caps, T--shirts and mugs but also some items with Social Security images. Eighty-six items are available for sale.
In case you're wondering, all of the images on these items are in the public domain. If you've visited D.C., you've seen vendors on the streets selling items such as these with the logos of the FBI and CIA and the Presidential seal, for instance.