Create list for cold calling in kent area

Hi we are after a list of companies that we can give to a cold caller to use for the opportunity to quote.

We are a design & print company based in kent. We are looking for medium size companies that would produce company literature that we could quote on.
We need the following

company name
point of contact
Tel number
email if possible (not essential )

looking for a list of around 500 and dont want to pay anymore than £50