I need a design for wrapping a commercial transit van

We have a large white transit van which we want to use to advertise 3 different companies. (One company on each side and one on the back) We want the design to be creative and eye catching, whilst working around the contours of the van itself. We have the logos and information for each of the companies, but need someone to create an overall design and provide the relevant image files that we can then send to a company to wrap the van in. I want to be able to review and discuss ideas, so the designer to be able to offer revisions until a design is agreed. It would be great to see examples of designers previous designs on commercial vehicles.