If the reports from Spain are to be believed, it is more than a front wing. There are supposedly fine channels in the W03's bodywork, starting on the nose and extending back over the entire car, which are designed to direct the air flowing over the car to where it is needed the most under certain conditions. The illustrations show a "W-duct", a three-pronged channel in the nose that re-route more air over one side of the car while the W03 is cornering, creating more aerodynamic grip on the outside. The front wing contributes to this, but it is not the only element in the design.
So yes, any team that tried to re-create this would need a complete overhaul, because the aerodynamics work across the entire body of the car, and not just the front wing.
To do some thinking out loud...For a couple of weeks now, I've been wondering if the intake on the step of the RB8's nose could possibly act as an intake for a passive F-duct on the rear beam wing. If you could manage to effectively blow the rear beam wing with exhaust gases (which could create a large sum of downforce, but drag as well), you might very well be able to stall the wing at a given speed (depending on the track) for a rather substantial benefit when it comes to drag reduction.
