Wasn't someone on one of AT: NY's Open Threads looking for one of these a few months ago?
Browsing The Magazine's website, we came upon the Red Cross cabinet by Cappellini. Designed by Thomas Ericksson in 1992, it's also available in blue or white. We like it because it's classic, and simple, and immediately recognizable for what it is.
The small (17"x17"x6"D) cabinet is made of enameled steel, and sells for $588 at The Magazine. Unica Home sells it for $603.