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104 / 94 refers to the Bolt Circle diameter or BCD of the chain rings. You need to make sure you get the right BCD ring or it will not fit
This link will tell you how to measure it for your specific crank
Sheldon Brown's Bicycle Glossary Bo--Bz
Also I am not sure what chain rings came as stock on that, if you get the correct BCD rings you sould be ablle to make it fit but you may have to grind a bit (ring tabs, shoulders). Also it may muck up the chainline, ring spacing (not sure how proprietory that crank was)- you could maybe try the Spesh forum somone on there will probably be able to advise on rings that absolutely will work.
Alternatively it's a pretty old crank and a decent bike, if it is in good nick it may not be a bad idea to get a whole new 9 speed crank and bottom bracket,
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