Contact Info for companies in Hampshire, Dorset & Wiltshire UK

I am seeking a proficient freelancer to compile contact information for companies located in Hampshire, Dorset, and Wiltshire, UK. The target companies should have a minimum of 10 employees. Required details include the contact name, telephone number, and email address of the individual responsible for marketing. This project will be executed in three stages: first, provide a preliminary list of eligible companies; second, I will approve the companies for targeting; third, deliver the complete list with all specified contact details.

£100 is my max budget, ideally looking to spend less.