kbowman not sure if this will help you because I don't know if you have these stores where you are, but SES have lots of cheap woolly (acrylic really) jackets and long jumpers this season - very cheap, mostly around $30. I bought one of the long jumpers and considered the jackets many times but in the end decided I didn't really need them. my only complaint would be that a lot of them had short sleeves - hello? why would i be wearing a coat or jacket if it was short sleeve weather? But there were some long sleeve ones.
indie, not sure but i think k-mart does over size 16? I know target does but I'm not a fan of their maternity clothes...