I've got one that was made specifically for an S2 GTS-T...Trust me when I say you don't want one on an S2. The grill setup is different to the GTR/series 1 GTS-T and as such the diversion plate blocks the majority of flow to the radiator rather than guiding air through it..
Tested back to back on 2 series 2 GTS-T's, both with identical mods, driving on the same stretch of road together, the one with the diversion plate had a water temp almost 10 degrees higher than the 1 without...