department head data find

We are looking for the name, emal address, department and title of chairmen and chairwomen of academic departments at colleges and universities in the United States. We are interested in as many as 20,000 records. However as we would conduct a trial first, bid on the basis of the first 5,000 records. We prefer some form of automated approach, perhaps a web crawler with editing but we are open to other approaches. We have a good deal of this kind of work for an individual with a good strategy.