That's this one here:
http://www.digitus.info/produkte/zubehoer/usb-hubs/usb-20-7-port-hub-da-70222/

It's a 7-port hub, but I've only tested it with 5 eruptors (and 7 Eruptors won't fit as the ports on the side are to near to each other).
I got it here in Vienna in a local computer store for 15 Euros.

(see also: http://geizhals.at/digitus-7-port-usb-2-0-hub-da-70222-a852140.html )

[edit]
Works also on my raspberry pi! (running stable for about 12 hours now)
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