yummy, yummy, yummy, I want olive oil cake in my tummy!

This recipe on Smitten Kitchen for blood orange olive oil cake looks yummylicious. I enjoy baking, but my husband isn't the type who will eat more than a slice or two of cake, which means that I have to eat the rest. Not that I mind, but I think my hips may! Anyway, that puts me off baking unless it's for a dinner party. But this does look tempting. Does anyone know if one gets blood oranges in South Africa?