I suspect that one reason we haven't seen more Austrians is that for many collectors, at their point of entry into the study of the history and into the hobby, are drawn to the French and British. Plus, though the Austrians fought in many of the battles, and were members of every coalition against the French, they were the St Louis Browns (baseball) of Europe after the Siege of Vienna. It was a long, gradual decline, but the Austrian Empire receded almost without reverse, from that time.
Prost!
Brad