I am trying to find a free "enclosed letter" font for use in a wedding bulletin (to indicate where the pastor, congregation, bride and groom speak using 'P', 'C', 'B' and 'G'). By "enclosed letter" I mean where the character is inversed against a rounded-rectangle; Mac OS X includes a font similar to this for numbers. I am looking for letters. Does anyone have a recommendation? I checked the guides for free fonts and was not able to find something like this.