Unfortunately, because of my height, I typically can only wear larges in adult women's, and sometimes even plus size. I think it would probably be a pretty simple alteration, and if I experimented with my sewing machine, I would eventually be able to get something down. However, if there's something out there, I'd prefer not to reinvent the wheel.
Edit: Also, as far as boobage goes, I'm currently feeling more in the way of feminine decoration around a male form. Although it's not really my intent, I actually get gendered female far more often when I go boobless adrogynous than when I go full on fem.