Where can I buy a new door lock actuator?

[VS 5.0]

I did ask the question at Brighton Holden, and that's what they said,
"Warranty is only valid if their Technicians Install it"

If you purchase a part from them, there are statutory warranties that apply to that part, irrespective of who installs it.

Their comment is just more of the same bullsh!t that the ACCC nabbed them for and got Holden to enter into the court enforceable undertaking that they will not continue to screw customers over.

TL;DR - they are lying and breaking the law in doing so.