I know, 2 posts in one day....this couldn't wait!!
I went into Pottery Barn this past Friday for some inspiration and LOOKIE what I found....on sale. I love these folding rulers and they were marked down to $3.59. I asked the sales person why they were on sale and he said they had so many of them and people don't usually look at them because they think they are props.
I looked on line and could not find them, so I guess they are only in the store! Good Luck!!