List of Design and Build Companies

Looking for someone to compile an excel spreadsheet of email addresses for people at active Design and Build companies around Greater London and Surrey. We would like to send them our company details to try and get some jobs to quote as we are a double glazing company.

A couple of companies we already work for and would like to target similar companies;
https://babeldevelopments.co.uk/
https://fsqdesignbuild.co.uk/

Ideally we would like a direct e-mail address for someone at the company and also the generic email address for the company