Thank you, Riva.
My wife and I are going to Prague in two weeks and there's a walk-in store called GM Electronic. Their prices are a little more than the UK but it will give me the chance to have a look at the stuff. There's no point buying, I suspect, because I could picture the security forces, sniffer dogs, and the rest kicking my head in if I try and board a plane with suspicious looking components in my bag. 
Your name is Riva? What are you doing up and about? The last Riva I heard of was found lying on a toilet floor shredded to bits by Oscar's pistol.