Music Download Site

We are an online retailer of dance music. We currently sell and ship Vinyl around the globe. [login to view URL] We are looking for a developer to create a section on our website where users can purchase MP3 music for download. The developer will need to create the following: 1)user interface where customers will search for items and purchase them and a ecommerce solution for that. 2)content management system so that administrators will be able to manage the content on the site 3)record label/artist interface where labels can sign up to participate, enter new releases, automatically generate sales reports and email them to labels, upload content to be sold. Content will need to be hidden so that those who purchase MP3s cannot share the links.