Prepare for painful money extraction - CBUS will cost you about $9,000 to install a basic system, and it doesn't take much to hit the $20k mark. I think CBUS can interface, but you would need a doodad (CBUS OPC server) to translate one protocol to another which would probably add another $5000 to the install!
(oh, and if the switches you like are priced anything like the CBUS ones...they'll be about $500 (five hundred) each...)
DIY electrical wiring to AS/NZS3000 - details here - http://goo.gl/9d33T (PDF file)