Feathered Friends makes a couple of wide bags, Condor and the Penguin. Rectangle and semi rectangular, respectively.
Looked real hard at getting a Condor, decided to try a couple quilts instead. With a custom width and over stuff, the 30° quilt was right around 335. Figure that temp range should cover most of what I,m doing around here..
Another hundred or thereabouts puts you into either sleeping bag. And you can get a zip on hood for either bag..