Research a list of companies approx 100

I have a list of companies im looking to find an email address for, ideally looking for direct email but I know its not always possible, happy to accept a small number of generic ones but not all.

Not all email addresses would be available but i would expect a return of at least 60% which i think is achievable.

Please only send proposals if you can make a start on this today, there is no budget indicated, i have 5000 companies in total but to start with i will trial 2/3 people with a batch of 100 each