Oh my goodness- I'm with the others, let your daughter buy you things! I can just picture her watching you open something she picked out, 'bought', and wrapped by herself! This is a wonderful idea!
I always did stockings for hubby and DD, and it bothered my DD that there was never anything in my stocking (she wondered if Santa was mad at me!!). So I did buy things for myself to put in my stocking, this made her happy that Santa remembered me as well.
Just grab a little cash, take her to the store, and stay enough out of the way that she can shop. Maybe bring something to let her cover up her find so you can stay close enough for your comfort. And let the store workers know what you are doing- they will totally help!
Just make sure to be SO happy with what she got you. Maybe you didn't know she thought you'd love your new coffee filters! :-)