Directory spider

This is basically a spidering project to collect email addresses. I have already built a programme that skims data from some well know online UK directories. However, I don't have the time to go to the next stage. The directories are searched by two fields - business type and location, i.e. recruitment agency in yorkshire. My programme currently takes the company name, telephone number, and website address (if there is one) of any companies that are displayed under the serach criteria - it also eliminates duplicates, but I don't have the time to take it to the next level yet. I need the programme to go to all the website addresses that are collected and collect email addresses from these websites.