The two most well-known manufacturers are Asetek and ECT.
Asetek produces the Vapochill units in all of their many incarnations, with varying levels of cooling power, wattage consumption and priced accordingly.
ECT offers the Prometeia. From what I've been able to gather, the Prometeia will provide slightly better performance. For instance, the latest unit is the Prometeia Mach 2 GT. These, like the Vapochills, will cost an arm and a leg, and then some. But then you'll probably be willing to spend such money since you started this thread.
An alternate solution is a water chiller. Certain other forums which I won't name list a bounty of info on this option. Mail me if interested.
Last thing, doing the proper necessary insulation to prevent condensation from damaging your components is a pain. I've been looking into this myself, and frankly I'm not looking forward to it.