New York & Co has a light grey heather one for $18.47. I have it and I really like it. The buttons do look a little cheap (they're like, plastic shiny silver things) but I plan on replacing them with something that looks a little better
The Liz Claiborne site has a basic cotton cardigan, but it's a plain, not heathered - a nice gray, though not quite as casual as heather. I can't post a picture.