Cees, I was a bit shocked to get this reply from Brawa:
Dear Mr. Banks,
Unfortunately we have to inform you that the item you require is no longer available.
Since our products are only produced in single editions and in series production, a spare part that is not available cannot be reproduced in isolation for economic reasons.
We thank you for your understanding.
Should you have any further questions, please do not hesitate to contact us.
Your BRAWA Service Team
BRAWA Artur Braun
Modellspielwarenfabrik GmbH + Co.