Python advertise halbrands, and will apparently do any offset required. Does anyone know where they get them from? Is it OZ? I found an OZ wheels website -
http://www.ozwheels.com.au - different phone number, nothing about specials - is this the same company ('cause they are just up the road from me)?
Also, check
http://www.roh.com.au and
http://www.compomotive.com - both have diagrams about how to measure up wheel requirements.