I need a freelance artist to paint murals in my companies meeting rooms

We have 4 meeting rooms names after London parks and are looking for a creative individual to paint large murals directly onto a wall in the meeting room. we would like each mural to depict a scene or landmark within the park to provide continuity across the rooms. For example Battersea Park is one room so could depict the Battersea Powerstation in the Mural in that room. We will be researching images and will share those with potential artists to provide some guidance on what we are looking for. Finally we are looking for this to be completed within a few days so fast, large bold art work is preferred over small time consuming detail.