I recently bought one of these little squares and figured I would model it and throw it up here. Great little square, by the way. The outside profile of the square is identical to the factory dimensions. I modded the slots to my liking, although not far off from the original. This one was just for fun. :)
Here is the company who makes it: http://www.woodpeck.com/minisquare.html
I bought mine here: http://www.performancetoolcenter.com/woodpeckers-minisquare-mini-square/