Hi Deb,
I got some great nightshirts a while back, they are considered women's T-Dresses I guess, and they are 26" across the chest and 35" long. Would that be close to the size you are looking for? They are 6oz cotton and have a nice feminine ribbed neck. Like this one:
http://www.etsy.com/view_listing.php?listing_id=14040415I bought lots of them cause they were a closeout, if you want one maybe I could just sell one to you at cost. The distributor quit making them. My family loves them so if nothing else I will have presents for them for the holidays. Feel free to email me if you need a shirt.
Depending on how tall your customer is, if you need a longer shirt you might want to look at these:
http://shop.vendio.com/mikejonea2/item/586267291/index.htmlThose folks are really nice and sooo helpful. Tell them I sent you.
I hope this helps!
Lilah