custom E-commerce website

I need an e-commerce website built. This website will be selling access to documents. These documents should be in a format that (when purchased and viewed) cannot be printed or copied. The site should be simple, yet fluid (such as the login function of [login to view URL]). Please show me examples of your work. NOTE that i need this website fully functional and built within 90 days. Also, i need a fully functional admin panel to upload the documents and create search categories. the site also needs certain aspects such as a customer login page, with their purchased products, also the ability to create coupons (ie buy 10, get your 11th free) and the ability to restrict the length of time that the documents are available after purchasing (such as 4 months) I will probably be using paypal for all money transactions