A 10metre cable may be a little long for the OPs needs :)
For the purposes of connecting to a hub at home any Ethernet cable is fine and you can get them from thousands of places as they are standard (CAT5, CAT5e or CAT6 really won't matter in this situation)
http://www.amazon.co....thernet+cable&x=0&y=0
Or if you are in a hurry, any PCworld, dixons, comet or even most larger supermarkets with a decent electronics section will sell them (will cost more though)