Cover Art Needed

As those of you reading this may know, I am currently working on my first story. While this may seem to be an absurd hour to discuss such a topic, it is now that I am at my most active. It is imperative that my work have a cover artwork worthy of the greats. The story is set in a futuristic version of Equestria, primarily the Everfree Valley (Cloudsdale/Ponyville region). I should clarify that I am not requesting that a new piece be drawn specifically for this story; simply clarifying as to where I can look would be very much appreciated.

Yours faithfully, X.