Elaborate Answer = 10 points-Is there such thing as an Audio/Video selector module for computer monitor input?
You need a VGA switch. Those are switchboxes that will allow you to switch between VGA sources going to one VGA monitor. Something like this: http://www.newegg.com/Product/Product.as px?Item=N82E16817802083&cm_re=vga_sw itch-_-17-802-083-_-Product
They have combination KVM switches that can switch both video and audio too, but those cost more.
VGA switchboxes and KVM switches are available at places like Newegg, Tigerdirect, etc.
correct me if im wrong
since the output your looking for is mainly for the monitor i don't think that you could find one that will go and insert to you monitor but.. you may find a a vga/hdmi cable that can do this and you can get one for your xbox360 also so its kinda like a input for the splitter.
so i would just keep looking for audio splitters and see what comes up. probably go down to your local electronic store and see what you come up with ;)
hope i helped















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