According to this source from 2003 the DoRos had several bancruptcies http://www.wirtschaftsblatt.at/home/68408/index.do
and that does not mean they ever stopped working - instead they started a new company. At the time of the article they left Vienna and moved to Munic and Jim Beach was supposed to be financially involved.
I don't know how many companies they have started and closed since then, but I think they are so clever, that they always keep their archive in safe hands.
I see, thanks for the reply, DoRo know all the tricks.
At least that explains why Queen Productions keep using DoRo to make videos, they are sitting on a gold mine, not only Queen either.