Check with your local pizza shops. I'm here in a somewhat large city in the Midwest and I know of a few different places that offer special pizzas. I know of some gluten-free pizzas, but I'm not sure if they use sugar or not. You might be able to find one without sugar though. Just call and ask.
If you're not successful in finding a pizza place that doesn't use sugar, and if you don't want to make your own crust and sauce, here's what my bf and I do:
We make personal pizzas with pita bread. We just leave it whole, top it with what we like, and pop it in the oven or toaster oven until the cheese melts (doesn't take long). If you can find pita bread that doesn't have sugar it's a fun idea. We use whole wheat pita ourselves and it's always awesome.
He likes regular pizza sauce on his and I prefer olive oil and garlic powder. Then we just top them with the toppings we want. We use the same cheese (usually mozzarella or goat cheese) but we can vary on toppings. I like to use a lot of vegetables, pineapple and pine nuts. And he likes more traditional toppings.
Just have fun with it and make it to your taste.