I purchased an HD1000 right when they came out many moons ago. Back then, I realized that it got very hot and so I looked for a solution. I purchased a Targus laptop chiller for about $13 on sale.
I took the cover off of my HD1000 and laid the chiller upside-down on top. This particular device vents out the rear. It is powered by a usb port. It adds a little noise to my setup (not a problem since it is behind glass doors), but my HD1000 is on its original power supply and still running well 4 years straight.