Where to find split charger?

Does anyone know where to get a split charger? I mean the front has only one and I am looking for one that plugs in and you can use 2 devices.
 
I have a gps and radar detector which I have to choose to plug in. I don't want to keep unplugging/plug the devices i use.

http://www.staples.com/webapp/wcs/stores/servlet/StaplesProductDisplay?&langId=-1&storeId=10001&catalogId=10051&productId=199194&cmArea=CG59:SC185:CG1033:CL163467

If that link is what your looking for.... best buy, circuit city, radio shack, staples, any store like that.