fidenza i take it. they have a load of applications, but arent worth the money really. i will have a look in the book when i get back to work monday, but i havent seen a x16xe flywheel.
to be honest i would just get a slotted steel flywheel and use a 7.25" clutch, even tho you dont want to, its the way to go!
i do 3kg ones for the 20xe, they are quite nice and if you manage to get a 2nd hand clutch setup you will end up paying around the same as the fidenza, but have a much better setup overall.