What is that, a flying saucer .Good luck anyway,i'm sure you'll get some help soon.
looks like you could cut the basic shape out of a sheet cake and the build the top with another cake to get the rounded shape. At least that is what I would do. Hope this helps
Thank you for your sheet cake suggestion! Any tips help!
I would say do the round part with a couple of layers of a 12" round cake and then the forward parts that stick out Iwould carve out of a sheet cake then cover with fondant. HTH