Hi Niels, I suppose that they are for Eye Jackets, right?
I just looked into my store inventory and I might be able to help you out. I, have been selling spare earstems for the Eye Jacket for a long time. I still have a frame left over, this one has been used and the fmj coating is not really like it has to be. But if you want, you can have it.
Where are you located in the Netherlands? Maybe you can pick them up somewhere?