680x Case Part

I have been trying to track down a 680x Case top dust filter replacement. I have been keeping an eye on the website for some time now, but they never seem to be in stock and the only other seller I have found does not ship to the US. I would prefer to get the original part rather than custom fitting one. Any ideas if more will be produced, or if there are other other options to buy from apart from directly through Corsair?