The list is limited and the prices are high. If you have a car you would be much better making a grocery stop on the way to the WDW. There a a bunch of good grocery stores on the way from the airport. Skip Gooding's very good selection, but very expensive.
Many of the car services include a 30 min stop for grocery.
Some people have orderd from on line companies that delivery.
We always rent a car and stop on the way. The last visit Dec'02 we stopped at the new PUBLIX in the Premium Outlets Mall. Brand new store good selection and decent prices