In the Nineties, there was an attempt to reanimate the series.
Even Roland Emmerich and his company was involved.

May be then, may be more early the seven episodes
have been subtitled by the Bavaria film studios.
But that's all rumors only.

Some how the tapes, or rather VHS copies of them,
were offered at eBay in the USA and a German fan
(bless him) bought them and copies in Div-X were made.

The quallity is rather worse but the text is well readable.
So it's only a mater of time and assiduity
to type them down and add them to the official DVD.