In Europe, X-Case carries a similar (but not identical) unit:
http://www.xcase.co.uk/hotswap-stoarge-kit-p/hddk...

I ordered two of those from them, and was pleased with the price and the speed and cost of delivery from the UK to Sweden. The units themselves are good as well, I'll probably order another two eventually, mostly just to fill up the front of my Lian Li A77B, I don't have enough SATA ports to actually host 20 disks in the chassis just yet :)