Brown velvet ones would be nice to match the belt, but they might be hard to find.
Try Jo-Anns fabrics or do a citysearch for specialty sewing/notions stores in your area. Take your jacket with you when you go to look - I'm sure you'll find something you like!
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To be yourself in a world that is constantly trying to make you something else is the greatest accomplishment ~ {Ralph Waldo Emerson}