Hi again everyone.
Still waiting on my M9A1... another few weeks til they arrive in Australia.
In the meantime, here's a few little discoveries I've stumbled across. I've been scouring the net to see if there are any aftermarket parts yet. The short answer is no. Aside from holsters, I can't find anything that doesn't require significant modifications.
Anyway, here's what I found (and sorry for the lack of hyperlinks - my browser is playing up again).
RED DOT SIGHTS / REFLEX:
If you send the guys at OneSourceTactical.com the slide for your Steyr M (any model), their technicians will cut a dovetail for the Trijicon RMR sight, or any other red dot sight of your choice. But beware, it's not cheap. $250 plus the sight. If you source the optics from them, it'll cost you an additional:
Trijicon RMR LED: $564 (sight)
Trijicon RMR Dual Illumination: $485 (sight)
Leupold Delta: $35 (extra milling) + $449 (sight)
Burris FastFire II: $35 (extra milling) + $209 (sight)
If you want backup iron sights, that'll cost you $50 (rear iron sight behind red dot) or $125 (rear iron sight in front of red dot sight)
Now, you may remember GTIdentity put a Burris FastFire II on his Steyr M9 a couple of years ago - http://www.steyrclub.com/vb/threads/8054-Burris-FastFire-II-red-dot-sight?p=71794
Anyway, GTIdentity milled the Burris Novak Dovetail mount, NOT the slide. It appears the guys at OneSourceTactical are milling the slide itself. It seems a shame to irreversibly cut up your Steyr that way. Mind you, the backup suppressor iron sights are a good idea (they explain why on their site under FAQ).
Check out their service here:
TRITIUM NIGHT SIGHTS:
Trijicon Steyr-Mannlicher M-A1 3 Dot Front & Rear Night Sight Sets are available from opticsplanet:
Well, thats all for now. One can only hope that these new imports trigger some action in the aftermarket.
Finally, I came across a fantastic overview of the history and design of the Steyr M and S series, written by PeteJ88 at TheFiringLine.com back in 1999: