Found another site that says they can be or at one time were available for purchase at Pier One imports, Linen and Things, Bed Bath and Beyond, as well as Shopko. All the sites that I found tonight showed a price in or around $70 US. IIRC, that's around what I paid for the 4 shelf units and less for the 3. I was able to buy one for $20 Cdn. It was the last one in stock and a floor model. I still maintain that they'd be pretty easy to make in SP. A few slats of wood, a few spindles, and a bunch of hinges.

A fish and a bird can fall in love, but where will they build their nest?