well there are a few options.
For air cooling i would check out Arctic Cooling.ARCTIC Accelero Mono Plus
$40ARCTIC Accelero Xtreme III
They also sell a hybrid liquid cooling and air cooling unit, but do not get it. Check out "The Mod" if you would want to do something like that. It has all the instructions on how to do the same thing with a cheap CLC, some zipties or a custom mount, and a fan.