Chile bought the Steyr when it first came out.
First production batch was 500 guns. Serial Number 357 also is in Canada; I have fired it.
I have made Steyr brass up from .223, but you have to really download the stuff; case-heads are very small in comparison. A full charge will enlarge the casing and wipe off the headstamp in 3 or 4 firings. It also does interesting things to the Extractor..... and there are NONE of those available..... and they are difficult and extremely expensive to make.
Starline makes the brass from time to time, as does Fiocchi.
You can make it up from .38 Super simply by trimming the semi-rim to a full rimless, bevelling the edge with a file. Size with .38 Special die which, if properly made, should have 5 thou of taper: all the Steyr wants or needs. Failing that, you can size the brass twice: first time for the .380 base (which the 38 Spl should give you) next for the .375 mouth..... which a 9mm Para die should give you. After that, just load as normal.
The Steyr is not a retarded blowback, nor is it a regular short-recoil gun. It shares its place with a VERY few other guns as a Torque-locked Rotating Barrel pistol. This is a good part of the reason the thing is amazingly tolerant of ammunition variations. Once you learn to hold one right and use the sights, you will find it to be amazingly accurate.
Hope this helps.
But TWO GRAND?
PLUS the shipping?
Buy the gun, not the factory!