I live in the EU as well, but I got replacements from Koss for free and within a few days by contacting their local affiliate branch in my country.
I would expect that you could do that as well in a lot of countries outside the US.
Check here for your country:
Once they have, you'll be able to view a graph of their reputation gained over time.
Here's a preview of what the graph will look like:
No reputation gained yet.