Here is a very interesting look at the uses for political Look Alikes. Here we see one being used as a juxed opposed scenario. Can be funny but at the same time hits a real niche in the market. Filming these types commercials are very popular in South Korea. There are warehouses with stages, green screen and audio setup for production through to post production. These are aired locally with a specific market in mind.
Mirror Images works a lot with the European market in commercials for local products.