Hello Hansen,

Unfortunately I can not tell you who made the kit in the 70's

But I do know that the German VTH verlag still sells the drawing for this plane (and many other classic pattern planes)

Try this link;

http://www.vth.de/shop/warenkorb/art...bfaad4b08.html

When it does not work then go to www.vth.de , then go to shop , then go to Modellbau , then Bauplane , then Flugmodelle , then Motorflugmodelle , and you will find the Marabu on page 16

Have fun!

Regards,
Gert