Grandma Dresses...to buy off the floor?

Hi Girls...I need lots of help! My Grammie is down for the week...my 'surprise' shower is Sunday, so this is the only opportunity I have to take her dress shopping.
Any places that have Grandma dresses to buy that are in stock. She's very short...a petite needs to be hemmed and very frail in shoulders, hips, legs, but very full through waist. She's the cutest little thing..
Anyway...as some of you may remember she injured her back over the summer and is getting better, but cannot be spending the entire day running around looking for dresses.

Does anybody have any ideas where I can take her tomorrow...?