Will16

Greetings fellow lexus owners. I am from Singapore and new to this forum. Owned my IS250 for slightly over a year now! I am currently running 17"s. Have been thinking of getting 18"s, however there are very limited selection of wheels for the IS here in Singapore. Now I am thinking of shipping them in from the US or elsewhere. However I am not sure about the PCD and offset. The dealership here is not much of help either. Can someone help me with the PCD and offset for IS250. Thanks in advance