DKW NZ 350

hi, i upload pictures of my wirbeluftfilter without holder on frame.

When i take down green colour, there was ORIGINAL DUKELGELB !!!

still i am looking for part BETREIB x KALT. When someone have this, i can buy please....

Both, filter + Kaltstart are parts wich can not be found easy.
I copied the pictures from an earlier topic, to make things clear.
A filter could possibly made from an old NZ-filter.
The Kaltstart-part however, I think not possible to make.
Lucky that the engine will run even without the Kaltstart.
Martin