<SNIP>
WARNING: Not entirely on point
You might want to look at exporting to HTML and then using something
like weasyprint to produce the PDF.
I only mention this because I have been helping a friend produce ebooks
using markdown, pandoc and weasyprint. Using a modest amount of CSS
gives very good PDF results.
I haven't tried it with letterheads, but I'm sure it would work well.
Why markdown? It was hard enough getting my friend away from Word!!
Maybe I can get him onto emacs in a year or two.
Alan
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Alan L Tyree http://www2.austlii.edu.au/~alan
