Here's a couple of links that are worth while. For German Aviation enthusiasts, the large set of Focke Fulf blueprints incudes many not before seen late model blueprints. For Mustang fans, the set of blueprints is from Claus Colling http://www.flugwerk.de/ including a comprehensive collection of manuals and CAD models from Gary Henry. These are the original sets that have not been ruined by the pirates that came afterwards (no cropping, blurring format changing etc.)

http://stores.ebay.com/Flug-archiv-2...2QQsclZ1QQtZkm

http://www.manualsontheweb.com/