A decent screen accurate replica of the very newest sonic will be available soon. Made by a company who specialise in adult executive toys, they claim screen accuracy to a level that it could be used in the show. Plus it actually will work as a screwdriver. Now you'll all have an excuse to carry it around. Ohhhh, it has sound too.......
http://www.doctorwhotoys.net/wowstuff.htm
http://www.doctorwhotoys.net/wowstuff.htm