I noticed that the Scott-Walker-as-Koch-Industries-puppet artwork made it into a Kos article, here:
http://www.dailykos.com/...
Although it may have come from the artist of the original puppet, I suspect it was taken from this photojournalist's report, with the background cleaned up to the plain white standard:
http://www.pamrotella.com/...
The original has a lot of fun Scott Walker art if you click the links to the photo gallery, some better than the puppet graphic. These are from the recall movement.
My favorites are the Walker Care sign, and Walker on the toy phone responding to the famous crank phone call.