Rebecca Minkoff has a few styles in ostrich. Here's a few out now:
Black Ostrich Nikki (also comes in brown):
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Brown Ostrich Morning After Clutch:
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Morning After Bag in Cream Leather w/ Brown Ostrich Trim:
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You might want to check out Ignes, if you are looking for genuine ostrich that's a bit more affordable (it's South American ostrich). Ignes allows you to customize your own bag, and the CS is incredible!