With the aftermarket sleds on the way... this would be something I'd be interested in. Although I wouldn't want a very large one. Since I'm planning to install a fan in my empeg, something that is the bare minimum (in size) for the sled, with vents on the top and side, would be ideal.

Edit: Also, I would probably prefer to have the emepg's fascia line up with the front of the box. But that's me.