I got an answer from the Amanita Design group,
the creators of the Machinarium game.
They say the Joseph paper model was not licensed by them,
and that they didn't know it existed.
So it seems the paper model by
Modelgradas was actually a "fanart" product
despite looking so professional and having the Machinarium logo and URL
(and even using some of the original graphics from the game).
Hope that clears things a bit regarding the kit.
Regards,