website graphic design + joomla integration

We are developing a website but some details about graphic design are missing. The base design is ready but need some improvement and banner designs according website and company information. in image attached you will find the base design of the frontpage and 1 section. The website will have 7 sections (showed in menu). so is required 1. improve some details in base design 2. design the remaining sections using base design. Is required something that read information to understand company bussiness for illustrate sections with pictures or custom banners. 3. For frontpage are required at least 3 banners. For internal sections are required illustrations or banners according company information and some instructions 3. The design require approval so is needed to give an image of how will look all sections and after approval the joomla integration can begin. We are looking someone that can bring us at least the first designs ASAP.