You shouldn't be able to get hold of something that's been banned. Not unless a thriving black market supplied you with the product you're demanding. How come then that banned ads are all over the Internet in form of videos and print ads? What are banned ads really?
Marketers not only never go full on delivering these ads to any publishing outlet, but they pretty much spoon feed them to bloggers with the intent of creating a shit storm of controversy about the ads and draw attention to their clients. That's the rule of the game.
For an ad to be banned it should have run somewhere and then pulled. Most banned ads are published for the first time by the people who supposedly are reporting about their banishment. The irony. Then again, there are people uploading ads on YouTube that they might have just recorded from their TV and labeling them as banned because it's just draws more traffic. Can you blame them?