Kailex will be cheaper for you to get a conversion cassette, the darn hub body is almost the same price than a conversion cassette from american classics for example.

I almost got a set of wheels fulcrum 5 last week and i was thinking on doing the same u mention and sort do not worth because of the cost. Besides looks like almost nobody have the fulcrum body available also.

Im running a easton vista shimano with a campagnolo conversion cassette right now and works fine.

Good luck.