Almost all game rules can be found on one site or another. One of these should find it for you. Also try thr maker of the games website.

http://darwinsgamecloset.com/
http://www.donsgamecloset.com/
http://boardgames.about.com/od/gamesaz/u/Board-Game-Rules-And-Strategies.
htmhttp://www.hasbro.com/customer-service/toy-game-instructions.cfmhttp://www.mastersgames.com/misc/product-index.htm