I have had a look around the net and can't find anything, perhaps if you do a google for Osteospermum asteracae - Whirlygig (it's the only one I can remember) you might find somewhere.

Sorry I can't be more helpful!

Thanks Teegee. Yes, I have had a look round the web too but hadn't managed to find anywhere locally that has them. It's a mystery! My search continues :)