IIRC Hansen was the primary importer for Privi Partizan ammunition.
I believe that Hansen was only an importer, I don't believe that they actually manufactured ammunition, but that may have changed when Yugoslavian ammunition became unobtainable.
The latest reference I've been able to find for them is a magazine article from 1995.
The last time I saw any of their ammunition for sale was also around that time, maybe a bit later.
I think things really went down hill when Yugoslavia began to disintegrate during the early to mid 1990s. Prvi Partizan's factory was in what is now Serbia, and I believe NATO did strike those areas pretty hard to stop the Kosovo War, but that was late in the 1990s.
By that time most products made in those areas were completely disrupted. For quite a few years I couldn't get Navip or Slijovonika (sp?) Slivovits because of the problems.