I just bought a cheap Faraday box off Amazon, £15 came with 2 pouches as well, have tried it and it works, plus it is quite attractive so the keys live in there at home. Am looking at getting a steering wheel lock but have yet to decide which will not scratch the leather, only want one that is quick and easy to use, and visible. At the end of the day if someone wants your car they will get it, all you need to do is stop the opportunist thief.