I can't help specifically with women's styles, but Hanes Beefy-T (5180) runs up to 6X in black, white, and one of the grays. Most other popular colors run up to 5X. They are ringspun cotton, so softer feeling than the similar cut from Gildan, or the like. Of course, a 6X men's is much larger than a women's, and cut differently, so not sure what the equivalent size would be. S&S stocks the full size range, many don't.
Also, you might check LAT. They have three women's size categories, each cut different. The "Curvy" might work. See their size chart PDF here:
http://www.latapparel.com/live/statichtml/2018SizeGuide.pdf
Also, you might check LAT. They have three women's size categories, each cut different. The "Curvy" might work. See their size chart PDF here:
http://www.latapparel.com/live/statichtml/2018SizeGuide.pdf