Internet search challenge:
EDIT: Found! See below!
At some point, circa the year 2000, someone posted a photo sequence of set of really nice LEGO dioramas illustrating the major scenes from the _Lord of the Rings_ books.
There were no LOTR kits at the time, so this was all out of someone's head. One detail I remember clearly is that they used Darth Vader LEGO figures as Nazgul.
If anyone can dig this up, or any specific information on it... well, that'd be really cool. And I'd be impressed.