I was looking for something similar a number of years ago and couldn't find one. I don't think there is such a design in square. I did find a beautiful square plateau, but it had scrollwork on the top and more ornate feet- a bit fancier than I had wanted but it was beautiful. Can't recall what company I bought it from any more....was too long ago, but it was direct from a company that sold only cake stands - not a site like Amazon.
http://www.simplyelegantwed.com/Cake_Stands-Silver.html
Silver Rectangle Cake Stand
Smooth Finish
with beaded edging
14 x 17, 6" Tall
$25
The hammered look:
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