I think 110 Kippax St, Surry Hills NSW 2010, Australia is their primary address but they also have offices at
116 V. A. Rufino St
Coherco Corporate Center
Makati, National Capital Region 1229, PH
200 E 6th St
Austin, Texas 78701, US
and
3A Shilipu Road
Vanke Times Center
Beijing, Chaoyang 101101, CN
Not sure which you would invoice, or company number etc. hopefully someone else can help.
Could I ask why you are invoicing them?