Need craigslist software/program

need a small program that will search craigslist based on specific keywords and compile the links so i can contact customers. For example if i was a house builder and i was looking for customers, I would set keywords of "need roof repair, build me deck, etc.. This would then search the city or state and compile all the listing that was created and when. Need something simple and fast. If you have something available already, let me know asap.