scraping script twitter facebook etc

We looking for script that can scrape keywords from twitter, facebook, linkedin, orkut, and other social sites. We pay $15 per scraping script for each site. so we start with twitter, facebook and linkedin (so $45 is max payment) after that we need much more sites) E.g. a person is writing twitter, facebook, etc he is looking for keyword e.g. a plummer, than this script collect all these messages, and our team can react on this dialog by a personal tweet (or via facebook etc etc). so now we used the keyword 'plummer as example, but in the script we can fill in hundreds or thousands of words.