Website scraper

I am looking for someone to develop a website scraper for my business. The scraper needs to work on a Mac platform and should be able to fully automate the data collection process. Specifically, I need the scraper to collect business emails from websites. The scraper must be reliable and accurate. I will provide details on the targeted websites and results that I expect from the scraper. If you have prior experience in developing website scrapers, I would like to hear about it. Please let me know the timeline and cost for this project. Thank you.