Yeah, Novak cuts (from reading, appears to be 0.33" x 65°), however, I've also read Springfield can also have 0.33 x 60°. Its my first 1911, so I'm not sure what to aim for.
I've emailed SA for the specs, I'm hoping for a local suppy (fingers crossed). Shipping from the US to Australia is expensive even for something small as pistol sight surprisingly