Book Create Application

We like to outsource the development of a custom book create application. Users should be able to select and sort items from a list. All items will be put in a pdf book that we can send to our printer. Users can also choose from a set of themes and they should be able to create a front and back cover. Also, when the book is created by the user, they should be able to order it. Our website is build with Joomla and I have created a blank Joomla Component already. You can take it from their. We like the application to be build in php, but flash is also accepted.