I am far from an expert on offsets - why you need anything beyond 10J which is an easy fit, I dont know ? Best to talk to a specialist like CM Wheels or BM AutoSport - but you know that I spose !!
Engine Mods: JB4 G5 ISO, BMS Backend Flash, BMS DCI, ETS FMIC, ER CP, AR Catless DP's, BMS OCC, BMS Cowel filters & Forge DV's.
Running Gear Mods: VMR 710's, Birds B3 Suspension, Stoptech Grooved Rotors & Yellow Stuff pads.