Help: Need one centercap/plate for Speedline Mistral

[famguy]

I've just bought some Speedline Mistrals, but they are missing 1 of 4 centercaps.

Someone know where to get?

Thanks for all help

I'm missing the whole thing inside the red cirkel.

Pic of rim with centercap/plate:

[famguy]

does speedline have any sort of homepage etc?