As you said, there's nothing in the rules that limits you to one. I'd be interested in another one, but I'll queue up behind other people who need one to get started – there's no point in being greedy about this project...
I'd like to make an OEM restoration and a Desert Diver or alternatively an all-black stealth version... Speaking of which, does anyone know where you can get your hands on some black lume, like on the Bell and Ross Phantom?