We, RCP, do ship to Europe. We had a problem with our system for a few weeks but that has been fixed.
If we did produce the C's again it would be out of stainless not aluminum. We don't get very many requests, so unless a bunch of people post here that they want them, we probably won't make them again. If enough people say they do we can try to do a smaller run.
For sure I'll buy another pair. Mine old pair is getting beat up. FYI, would there be a notch in the c's for tighter turning radius? That would be a cool feature.