not sure if this is what you have in mind but I've been looking at these and will eventually get some for displaying purposes (I've been swayed to the rack side for my soon growing collection).

http://www.habitatsystemsltd.com/

http://www.showcasecages.com/index.htm

they are on the pricey side, but for one or two display "tanks" I think they are worth it because of how they are built and set up.