You can get wrist bands at any drugstore that has a travel section, or amazon. There is a little ball that pushes on a spot on your wrist to stop nausea and they will come with instructions to help you place them correctly.
You can get crystalized ginger at a natural foods store, or the ginger chews in the candy row of some stores. I've bought it at Ross and Home Goods, even, as well as my local Asian Foods store. I take the ginger chews when traveling because they are individually wrapped and crystalized ginger is usually in the bulk foods area. You can search ginger chews on amazon and get a lot of different brands - I've used gin-gins, chimes and the prince of peace brands and they all seem to be pretty equal.