ATO Script's Gallery Admin will do this. You can also use the scripts for TGPs, other links, any type of traffic.
Alternately, just setup your 404 page to redirect to random links like so, put this in the head:
<SCRIPT>
<!--
//Specify as many random links as you want below and number accordingly
var randomlinks=new Array()
randomlinks[0]="http://www.url.one"
randomlinks[1]="http://www.url.two"
function randomlink(){
window.location=randomlinks[Math.floor(Math.random()*randomlinks.length)]
}
//-->
</SCRIPT>
and throw this in your body tag:
<BODY ONLOAD="randomlink()">
This will redirect them to a random specified url every page load