Database marketing/information

We are seeking to gather data (excel or CSV) on independent estate agents who specialize in selling properties and not in renting properties in London.
We want to concentrate on London postcodes. For example SE SW NW NE etc.
We are also interested in independent agents in Manchester Birmingham and Liverpool.
We are not interested in agents specializing in renting properties.
We need some idea as to numbers and the time frame.
We require the company name, address, website address, email address, and phone number.
The purpose of the exercise is to contact agents to offer them the opportunity of joining our affiliate program.
The affiliate program will provide the agent with a free ready-made business package of Italian properties and businesses for sale. There is also a full range of associated services that include Property finding, translations, legal, architectural, International building services, villa rentals and much more.
Affiliate members receive generous commissions on each and every service or sale their buyer makes.
We have done all the hard work and offer the affiliate a ready-made business opportunity, that can generate revenue hand over fist.
We would welcome ideas from interested respondents. Only performers with a traceable track record need apply.