Here's a great place to see what's available:
http://www.racksandstands.com/
I found one I liked and found the manufacturer, and then called to find a local dealer.
http://www.laurierfurniture.com/eng/index.html is the company that had the one I liked.
http://www.laurierfurniture.com/eng/...cy/legacy.html
You can get some of them as a single audio tower rather than a whole entertainment unit, and some even come with a feature where the shelves inside are on a separated pivot so you can turn the equipment around and get at the cables without moving the furniture itself!