Yes, get the 5 volts version of Arduino - most of HALL sensors work better with this voltage.

In Eagle forum a guy buy this assembled Chinese bards in Taobao:

http://forums.eagle.ru/showpost.php?p=2736643&postcount=14

The guy that make this is "flight simmer".

Or buy the components through eBay and assemble you own, this is the spirit of "DIY". smile