[Zope-dev] somehow OT: How do I get a tar file containing the ".dtml" files only?

Hi! I am working on internationalizing a Zope 2.4.1 instance with ZBabel and providing a set of patches for Zope 2.4.1. My idea was that things would become much easier if I had a tarball that just contains all *.dtml files and the folder structure for them, so I can distribute the tarball as a patch that can be applied to a plain 2.4.1 instance. Do we have any Unix/Linux/GNU experts on the list who know how to write that as a shell command? I am sure that with tar and grep and some pipes or so it is possible, I am just too dumb to find out the right syntax ... Cheers Joachim