Went to DT Panels after work and reache there around 5.30. The gap is not that bad, around 5mm at most. So we decided to push the lip into the bumper & the gap moves to the end. So there will be a small gap near the rear wheels and will be filled up with silicon.
Frank, it all depends on how much the price is with the current exchange. Just come back to Melbourne earlier and help me find the rims or find me a good rims in indo hehe