I don't know if this exists, but this is what I need.

I need something that takes 2 a/v sources, and passes them through to 2 televisions. Then with a (button push, etc) switches the display's that it is outputing to

Example

Source 1 shows on TV 1, Source 2 shows on tv 2, push button, source 1 is now on tv 2 and source 2 is now on tv 1

Any suggestions?