I recently discovered the poster website postercabaret. Type in "bicycles" in the search bar and a bunch of cool posters come up, like this one by Will Bryant:
And this one by Diana Sudyka:
Most are limited editions. Some are sold out, like this one titled "Ghost Rider of the Paris-Roubaix, " also by Diana Sudyka.
At the top of the list is a poster by Dario Pegoretti.