the plug you're looking for I think is called a Mini Din plug or a 5mm... one of the 2 (yeah - I'm helpful....NOT)
the answer to your problems is Radio Shack. They have adapters for things that haven't even been built yet!
"The one truly great thing about this life is that noone can sincerely and truly help someone, without helping themselves"
Ralph Waldo Emerson
Ralph Waldo Emerson