This is about the nicest response you're likely to receive for such a request.
I went and looked at your DA gallery, and I can see that you've drawn things yourself. So I think you could have a reasonable appreciation for the time that it takes for an artist to design/draw/paint something. Consider that artists, such as the one you just asked, use their art to earn money & feed themselves. Why would they give that time away to you, for free? Why would they devalue their own work, work that other people ARE willing to pay for?