Car sold during the week guys.
In terms of the tow bar, I asked at the dealer when I got the car and got the same response.
According to the guy I was dealing with, Sydney City Lexus only outsource it to Fastfit at Petersham.
I went there direct for the install and they did a great job.
Only comment would be if you are installing only for bikes, make sure you ask them to put the wiring loom plug under the carpet in the boot, rather than fix off to the outside (I didn't and it certainly would be better on the inside).