I've been going to the Northbrook Barnaby's since the 70's and it's probably my favorite thin crust pizza of all.
They do sheet the pizza, grab a handful of cornmeal, throw it on a plastic tray and put the flattened dough on the tray. Then they use a round piece of wood that is small in diameter to the pizza and crimp the edges up around it. You can watch this assembly line show every day around lunchtime.
My friend worked there in the last ten years and said he saw cans of Stanislaus Pizziaolo sauce. Don't know if they add anything to it or if this is their sauce but I have not bought any yet. I'll be honest, if I want Barnaby's, I just go to the restaurant itself (about 7 minutes from home and work) so I don't worry about making it at home. But one day I should get around to making it. I used to make pizzas from scratch a lot, but I haven't had as much time as I used to. My uncle, on the other hand will make homemade pizzas every single night.
Man, all this talk about Barnaby's makes me want to order it tonight (and I just had it Friday for lunch!).