Thanks all! You've convinced me that I do not need to buy yet another specialized contraption to make a good deep dish pizza. I already have everything I need.

We've had great luck using our cast iron skillet for deep dish pizza. My husband's recipe is here: http://www.food52.com/recipes/4435_iron_skillet_pizza

I use my round cake pans as well, and I've read a technique to use a spring-form pan which I'm going to try next. Grease it well, and you shouldn't need to worry about not having non-stick. If you're still concerned, I'd line the bottom with a round of parchment.

I use my regular round cake pans, which are heavy aluminum and are not non-stick. I've used glass pie plates, too.