Design new background for Social accounts

I shall need a new background images for Site's Social profiles. [login to view URL] Facebook Size of 851 pixels wide by 315 pixels tall Twitter Size of 1500 pixels wide by 500 pixels tall Google Size of 2120 pixels wide by 1192 pixels tall (or 1080x608) LinkedIn Pixel Dimensions between 1000 X 425 and 4000 X 4000 (File type JPG, GIF or PNG, No larger than 4MB) * Proposals should use Site's color scheme but should be different from current design which consist only Blue transparent background+Slogan+Site's URL. * This Site is an online Trading Portal in Italy and design should look serious, sharp & based on Trading arena. * Do not use general images can be found on all free sites or low cost ones. *I will be happy to pay for pictures used separately to ensure all project amount goes for your work on its concept & Design only. * Images will be chosen may display Live Borsa Stock Exchange moments. * All images should be in Maximum DPI & quality.