That's a beautiful dress. Which color did you get, the grey or the navy?Last year I was looking for a dress for a wedding, and at Macy's, they had a huge rack of shrugs. Most were black, but they did have a few other colors.
The other thought was a stole. Here's a light one that comes in several colors that might work.
http://shop.nordstrom.com/s/be.....color=SAND