We are looking for a German-speaking freelancer to research contact data

We are looking for a German-speaking freelancer to research contact data (first name, last name, address, department/function, telephone number, e-mail, etc.) of municipalities and public companies in Germany. The specific region (district or postal code) will be provided by us, and we are targeting contact persons from particular departments or areas. The project will start with 5-10 working hours, with the possibility of extension depending on the quality of the results. Please provide an estimate of how many addresses you can collect within this time frame and specify your price expectations (fixed price or hourly rate).