Sympathy for book covers

I received the first draft of the book cover and the artists are waaaayyy smarter than me. I now know that the book cover needs to draw a reader in rather than match the story - and here is the important part - AND have art that can be printed, reprinted, and altered. I need someone who is willing to sell away their rights to the picture, drawing, or whatever is on my cover giving me all rights to do with it as I please. There are websites like iStockPhoto and Fotolia that will sell you photos and the like giving you full rights to it. So not only do I need to make the cover represent my book, I have to get cool stuff too. I will post the cover as soon as I have finally approved it.