You may also want to look at J & G Cyclewear. they have sizes up to 4XL. The nice thing is that they are made right here in Oregon and you buy from them direct. Their description notes that the jerseys are cut for real people and not skin tight. The jerseys are plain, but that is not a bad thing. If you catch them on a over run sale, they are $30. I have not used them personally, but everyone that I have talked to loves them, and comments on how well built they are. This fall I'll be buying a long sleeve jersey and some rain gear from them.
Edit, here is a link to the jerseys.
http://www.bicycleclothing.com/Mens-Bike-Jerseys.html