Has a map poster of the London Tube subway lines ever been printed?

Amazon.com lists several different posters of the London Tube subway lines, better-known to the British as the "London Underground." AllPosters.com also features numerous London Underground poster maps.

Poster maps of the London Underground are printed in a variety of sizes and colors. Most maps feature white backgrounds and use the official Transport for London colors to identify the different lines. For example, the Central Line is red and the Circle Line is yellow.

More unique poster maps include vintage maps that show the Underground system as it was in the 1930s, modern versions with black backgrounds and stylistic designs with no writing to identify stations or landmarks.