Hi scorpio1960. How nice of you to want to do something for your nurse.
How about a gift card? I think banks sell Visa gift cards that can be used anywhere like a credit card. If you get one of these, be sure to tell her to use it soon or they start deducting from the balance (which is crazy!). Or maybe you could give her a gift card from Starbucks or another store.
I am sure it will mean a lot to her that you are thinking of her.