Website and PDF

Hi,
I like Website tool to publish my documentation
bcause of the nice menu bar.
However if I have to provide the documentation as
PDF I have to go to "plain docbook" ?

I do not like the idea to duplicate my XML basis.
Any ideas ?

I do not adhere to Website as WWW-publishing tool.
If someone give some advice how to generate smart
looking HTML from pure docbook, that's ok.

Thomas