I'm a little late to the party here but I got a business centurion invite two days ago on 10/6 and still had the option to select an art card, so perhaps that 9/30 deadline was a little aggressive. I got the floral one. It should arrive today but I'm not in town to receive it, haha.
I'm excited about the Centurion Living program and plan to take advantage of whatever events I can squeeze in. Seems pretty cool.