I need a professional sales letter to be written about a business service for sales

I have completed a full description of one subscription based business service that is financial information provision in nature to be made available in the near future. I have written a sales pitch letter in my own words about the proposed service. I have also written service description as far as I could cover but still needs many legal and business issues to be covered to be fully informative to customers like terms and conditions, privacy statement, copyright, disclaimer in addition for the service to be easily understood in layman term etc.

I am looking for a professional writer to read my service description material and the drafted sales pitch letter and then completely rewrite them in order to develop a more fluid comprehensive easily understood and attractive sellable proposition that anyone can understand and find interesting as a service to pay for.

On the legal points needed, the writer needs only to make a best effort to suggest proper wordings or statements but at the end the whole document will be passed on to professional legal advisors to turn the critical customer's agreement part into a water tight document.