hi shan,
the 2+2 has slightly different offset (i think). The RB's in the offset you quoted will work great for 2 seaters.
The only rims you will find to fill out zgs are wats, roh, arrows, steelies, any cusatom wheels really or some old school jap ones, and maybe performance alloys (http://www.performancewheels.com.au/alloywheels_classic.asp)
Ben