Template of a set of multiple documents?

I have a Writer document that in more than one place have content linked from a Calc document. Now I need to make these 2 documents into template, where every month I can create new version of the documents set, in each version the Writer document will be linked to the that version of the Calc document, not the original template.

Any idea how I can achieve that?

Note: originally I am thinking to embed the Calc document inside the Writer document, but as expressed in my other question Linked data from an embedded document apparently this cannot be done.