Line drawings for website

Hello! We need an experienced illustrator who specialises in b+w line drawings of buildings and people, to produce a series of 7 images (office building X1 plus person in different scenario X6) for use on a company website and on marketing postcards. The images will need to appear professional and confident, yet quirky and humourous. Please send specific examples of relevant work. We'll make a decision by 20/01/12 as we need the images asap (full brief will be available). Thanks.