Did you have a look at www.Dahuawiki.com ? The model with the A in the name looks like a US domestic market model. And normally they equal an international market model, except of the naming and support.
From the tech specs it looks like, but can't tell you for sure. The case seems to be different.
Normally the firmware would not flash if the model isn't in the supported device list of the firmware. So it worth a try, but on your own risk of course