Not exactly what you speak of, but Quadraspire, which is probably veneer over MDF, works very nicely and allows you to reconfigure the rack at will, simply by replacing the spacer rods with longer or shorter ones. I have one for my AV stuff and another for my hifi. The AV is double width and uses thicker shelves. No reason you can't stack your hifi gear on it. Not the ultimate rack, but considering price and flexibility, I'm very pleased with it.
