Looks very similar to the packaging from DealExtreme.
If you don't mind waiting 2-3 weeks for it to arrive, $7.69 shipped from Hong Kong is an easy alternative.
http://www.dealextreme.com/p/usb-2-0-10-100mbps-rj45-lan-ethernet-network-adapter-dongle-34691
The drivers for this can be downloaded from http://www.moschip.com/mcs7830_downloads.php (site registration required), but if it's the same as the OP's ethernet adapter, then his link should work too.