Originally Posted by
christep
One place airside may have this stuff and opens at 7am
Sound & Vision, Shopping - Hong Kong International Airport
But really be very sure of your pricing. I'd be really quite surprised if you can save much if anything vs other places. And also be careful about the validity or otherwise of the warranty outside Greater China.
Note that this place is in the midfield concourse.
A lot of the shops in the main terminal are under renovation due to the duty free operator changeover.