Heller Aurora - Did Heller sell off the molds?

[Shockwave Rider]

I came across a Heller Aurora in my loft insulation sort out. Turning to Scalemates to figure its history, I was surprised to see the Heller boxing only appearing once, in the 1970s. Subsequent entries are for other manufacturers e.g. Maquette.

 

Did Heller sell off the molds for this vessel?

or

Did they allow it be cross-kitted, thereafter not producing it themselves?

or

Did they sell off the molds?

 

Shame I can't find the box for the kit.

 

Many thanks,

Angus