Haven't tried this but--could you use an apron shape but add enough to the fold (center front) to make a faux front like on a man's dress shirt and add buttons? Here's what I'd try--add another 2 1/2" or so. Stitch that and then press is so the fold line is on the seam so that first stitching is underneath the "placket". Now press that and topstitch about 1/4" from each edge. Sew buttons where they "ought" to be as on a shirt. Is that clear as mud?