Hi Brian,I think you'll find that the condemned grandstand was pulled down quite a while ago and the latest news i have heard via a television program called "Blinkers off" hosted by Chris Barsby and David Fowler (which is also uploaded to youtube which is great IMO) is that there is talk of a new grandstand being built and racing to stay at AP.
I hope this helps,time will tell i suppose if this happens.
Best wishes