Given that documents should only be created where they add value, and every project is unique a 'one size fits all' approach to templates for such documents is inappropriate. The templates we offer as a member benefit are intended to guide your thinking about what MIGHT be valuable as something to capture in a document, but it is for YOU rather than the project management framework to decide what is valuable. It is also far more important that a properly shared understanding of e.g. a business case is achieved rather than a business case document is created. As one of the thought leaders is the world of agile said, it is important to understand that "formality is not disciple and documentation is not understanding".