So here's the resulting package tree. If anyone knows how to turn it into a darcs working copy and create a patch from it, please do!

It's easy (and I recommend you do it yourself).

 * darcs get http://...blah/blah/foo
 * cp -R /my/hacked/copy/of/foo/* foo
 * cd foo
 * darcs record
 * darcs send --help

That is, just copy your version of the source tree on top of a darcs repository of the original source tree, then record the changes.

Regards,
   Malcolm