Hi AirmanJack,
Welcome to the board.
From what I've heard the Air Corps flying suits are identical to the American standard issue ones, the only difference being the Air Corps ones have epaullettes for rank markings.
They are currently changing the issue flying jacket, the heli crews wear Alpha helmets but I don't know what the exact model is and I'm unsure what model flying helmets the PC-9 crews wear, but as far as I know they are of US origin.
The flying boots are not the same ones that are issued to the Army as far as I know.
Hope this helps.
Regards,
Frank.