Just saw this one mentioned on another site, if you go to the 'Contact Me' page, there's a pdf file with the flags for every unit present at Waterloo! They're in 1:72nd scale, but it should be easy enough to reduce them down.
http://homepage.ntlworld.com/martnickv1/ (http://homepage.ntlworld.com/martnickv1/)
8)
Wow! He's been a busy bunny, hasn't he. I admire single-mindedness. Great resource, though. =D>