We found a listing for what is described as "concept movie poster art" from The Empire Strikes Back
poster artist Tom Jung. While it may seem that this was done in 1979-1980 in preparation for one of the film's iconic one sheets, chances are extremely good it was drawn in the last decade. Follow this link to have a closer look at this very nice piece of art
, but buyer beware, it isn't nearly as valuable as the seller would lead you to believe.