Motocross Helme produzieren lassen?

You could look here, for example:

Motocross helmet, China motocross helmet, motocross helmet Manufacturers, China motocross helmet catalog (made-in-china.com)

Although some are relatively high minimum order quantities, if you find someone with a small minimum order quantity simply request (and also ask for the price, the prices that are not necessarily right there), whether the helmets can produce with your own design. Many manufacturers also offer individual prototypes to convince themselves of the quality in view of larger quantities. In addition, it is of course also necessary to pay attention to the test seals required for distribution in Germany.

I had previously gained good experience with Chinese manufacturers. I used to make CNC milling parts with complicated geometry. Read it all well. I wrote the appropriate manufacturer on the website and received a reply very quickly. The further correspondence then no longer ran over the page, but directly via email.

I hope I could help you with this.