They aren't really calzones just don't know the name of them besides pies. You can usually find them at Staters around the Inland Empire, at the one I go to it's in the back right corner on a little rotation rack.

Edit: They tend to be in paper wrappers, with basic flavors like chocolate pudding, vanilla pudding, cherry filled, think I've even seen orange ones on occasion.

Edit2: the brand is called Mrs. Redds.