Web Application - Contacts Database & Lists Management

Dear Freelancer, We are an Email Marketing & Marketing Database List Broker company. Now, we are looking for a good PHP coder + MySQL expert to build a web-based "Contacts Database & Lists Management". Here is our case: 1. Currently, we are managing our database in Excel using search, filter, etc... function in Excel. 2. We are storing hundreds of thousands of contacts that contain Company Name, Name, Position, Telephone, Fax, Email, Add 1, Add 2, State, Postcode, Country, Business Nature, etc... 3. We have few lists i.e. - Business List and Consumer List What we want: 1. Build an web-based system similar to what we are doing with Excel, that can import, export, manage (search, edit, remove, etc...) via internet browser rather than on Ms. Excel. 2. Reference: [login to view URL], this website will tell you what we want... but we need something more basic than this. 3. Furthermore, potential client can search for database that they want, on our website then it shows the count. Once confirm, they can pay online and get the database immediately. 4. It has some kind of web security to make sure our database are stored securely. Anyone can help? BR Travis