How about something like this?
http://www.llbean.com/llb/shop/64946...ed-ridge-parka
I'm pretty sure this is my coat and it goes up to 3x
http://www.eddiebauer.com/catalog/pr...mPathInfo=null
And this one comes in 3x, rated to -20
http://www.landsend.com/products/wom...a/id_243928_57
Or this one rated to -35
http://www.landsend.com/products/wom...a/id_243931_57
This is a Columbia jacket in 3x
http://www.sierratradingpost.com/col...colorFamily=02
You could also try Junonia as well.
