http://members.fortunecity.com/inedesca/
http://avia.russian.ee/air/usa/l_usa.html
http://www.penio.narod.ru/
http://wherewolf.narod.ru/drawings/Drawings1.htm
http://wherewolf.narod.ru/drawings2/Drawings2.htm
http://www.vought.com/heritage/html/down.html
http://www.aeroflight.co.uk/guide/drawings.htm
http://membres.lycos.fr/wings2/3vues/3vues.html

Some of these, especially the Russian sites are a little slow, but there is a lot there.