I've got one of these that I'm looking to off:
Cooler Master ATC-600-GX1
http://www.colorcase.be/grafiek/cases/atc600gx1.jpgI originally paid over $150 for it w/o power supply. I'd be willing to let it go for $100 shipped and I'll throw in a 400w power supply unused that came with a recent tower I purchased.
It's got some wear on it but now much.
As far as component size, it's standard stereo component size. The issue with it, at least in my case, is that it's fairly long. My entertainment center has one of those stupid pieces of cardboard on the back and the wife wasn't real keen on the idea of me cutting a hole in it to get it to fit.
It's nice because it looks a lot like a amp unit that you'd see for a stereo system.
I'd be happy to measure and take pics if you're interested.
Ultimately, I went with a case, when sitting next to the entertainment center, looks like a subwoofer thanks to the door on the front that has mesh running down the middle of it so that I can put my IR/RF receivers inside the door for my cordless controller and keyboard.