Because my system was in our living room, and because we had mostly antiques, I was in a similar situation as you. Searching antique dealers, I was able to find a cabinet meant to display dishware that probably originally sat on top of a counter. By strengthening the sides and back and converting the shelves to maple (from Timbernation), this became quite rigid and functioned very well. If you are interested, give me your email address and I will send a picture.
