I have a Campy drivetrain save for a 9-speed Ultegra cassette on a Dura Ace hub. There's a Campy 9-speed Exa cassette for sale that I'd like to get, and I've got a line on a new Mavic Campy-compatible 10-speed freehub body that I'd like to put on the Dura Ace hub.

Question: Does a 9-speed "Exa" cassette fit okay on a new 10-speed freehub body ?

Another question: When did they stop making Exa cassettes? The advertising says "new in box," which I would assume would be "new old stock." Wouldn't it?