Dataport plastic cover replacement?

The little plastic snap cover on my dataport/headphonejack/charger socket is cracked and won't last much longer.

I've looked around at the Samsung site, and various third-party suppliers of accessories, and can't seem to find a replacement one anywhere.  Maybe that's because I don't know exactly what to call it and can't do a proper search.

Does anyone know where to get spares?  After my current one breaks I'd like to replace it so that I can continue to keep pocket lint out of the dataport.

Thanks.

I didn't see anything on eBay.