Email addresses of 100 FTSE listed companies

I need email addresses for all directors, brand managers, PR managers, social media managers, marketing managers, and corporate social responsibility managers for 100 FTSE-listed companies.

Using Companies' house, FT.com and individual company websites, as well as search engine research, will provide details of these individuals and their email addresses.

The format of the data I require is a csv, with the following columns: Company, First Name, Last Name, Position (Job role), E-mail address, Company Website.

This is for a charity venture, so I need this to be as cost-effective as possible.