You could always salt preserve them like you do lemons for Moroccan cuisine, or make candied orange peels, which are so much better when homemade.
I think I am going to try to make something I've never tried before if I can get everything I need today as it takes 10-14 days to mature. No, not a fruitcake. Kind of a last minute idea and 1 of the ingredients isn't real common. It's a gift for Craig so everybody else has to wait too to see if it works. He has my car and I hate driving his truck so I don't really want to go far.