Simple sound input module

Anyone know where I can get a simple sound input module for Arduino in the UK? I know Spark fun do one like this but I didn't want to pay for shipping from the US... All I need to do is to get my little robot to stop when I shout (or clap etc.) at it. Thanks Alan

Got mine on Ebay for $5 inc S&H. The sparkfun does not include an opamp, so it is not at all sensitive.

Several places sell them but I would recommend here I have bought stuff from them a couple of times and they were very good and the P&P is reasonable if you group several items into one order.