In the late 1940s, a few casted beetle modells were made by Volkswagen as a christmas-gift for a handfull workers . I have heard about a number of 500 cars. They were fixed on a metal base with a plate. A member of our shop got this modell from his grandfather and will bring it to me for a foto-shooting tomorrow morning.
Heiligenhausen is a small town close to Velbert. In this area, a lot of companies exist, who produces metalparts for the technical industrie. I have no idea, if there is any company in Heiligenhausen, who delivered parts for the production of Volkswagen, but maybe it is the right way of thinking.