Yes, I will send my email to the Ministerial Office.
You do NOT have to be a resident of NSW to make a complaint, and the Minister's office would be a sensible address, afterall, whether you are NSW based, or anywhere else in Australia or overseas, and you are currently trying to access the online index, particularly with a view to purchase an historical record, you really have many reasons to complain about the current service.
Cheers, JM