ISO Certifications will come from the plant in Malaysia, China, Taiwan, not from the company which chooses to brand their name on the product (wherever manufactured).
So if X company manufactures "Copy" wheels, and company B sells them as the XR001, and C Company sells them as BB02, neither worry about certifications, just X.
For example:
http://www.vesteonchina.com/pro_view.asp?pro_id=340