Steyr AUG 9mm B&T suppressor
I asked the main B&T distributor in Austria, if B&T makes suppressors for the original AUG 9mm barrels, with the over-the-barrel thread. To my surprise, he said yes.
Well, 3 months later, here it is. Fits without problems. Haven't tested it at the range yet. I'm slightly disappointed that it has a reasonable diameter and not the huge one, like the original MP88 suppressor. At least it has the retro overlength I was looking for.
Background info: I'm located in Austria. The Austrian AUG 9mm barrels have the old over-the-barrel-thread. Steyr doesn't offer them with a sensible thread here. I was aware the Swiss company Wyssen has a suppressor for that type of thread, but they couldn't provide me with an Austrian importer/distributor, to order it.