Alibunmum
Wise Old Thumper
Found this on Amazon USA today. Works out at £25 including postage so pretty expensive but if it works it will be worth it!
http://www.amazon.com/gp/product/B000Y8GQ56/ref=ox_ya_os_product
http://www.amazon.com/gp/product/B000Y8GQ56/ref=ox_ya_os_product