For those interested Letter Gothic is available from several online type shops but be aware that since the original was released it has been reissued as both fixed and proportional variants. Additionally, it looks good out of the box on OSX but under Linux you'll want to ensure that you are running a font config like Infinality.

I own the monotype version of regular and bold, they work well, but other variants might be worth trying out. http://www.fontshop.com/fonts/singles/monotype/letter_gothic...