A possible alternative, if you are looking for one...
If you find the webmaster is responsive to your requests, you could try to use negotiation skills to change their bad habbits from the perspective that perhaps they haven't yet come to appreciate the tremendous effort others put into their own work.. and that they may not be aware that copying directly from those works could actually reduce the potential of their sites to gain traffic due to duplicate content filters.
They may not be considering that it would be almost as easy to write documents in their own words, and create what would effectively be a new and separate piece of work.
Then again, it may prove entirely ineffective at changing their behavior.. in which case the other suggestions would be a great solution to the problem.
Just another option
Kevin