@Jim,
yeap, but try to describe these things in German on the phone...
alternative b) was to contact the Italians. See?
@Phil,
yes, it is your rack, and after I posted here I started doubting of myself. I'm not 100% sure that the kit were already mounted on it when I got it
Regarding the extra spacers, they are there because the mushroom seats on the lower "slit" on the rack. They are exactly as thick as the difference in height between the black surface and the aluminium surface in the styles A and B of your rack (I have the C). Now that I think a bit harder, I'm pretty positive everything was already mounted and I only had to bolt it to the bike. About sending them, it's great of you to offer, but it's too much logistics for the problem at hand. I was hoping somebody could point me in the right direction to look for them here in Europe. I think I prefer to kick myself in the testicles than getting another notice from the Zoll (German customs) and having to show up there to pick up the parts.
Yeap, "
GIVI mushroom thingy" seems the right engineering term...