[queasy27]

Depending on what low carb means to you:

Walmart has their Marketside brand of prepared pepperoni and mozzarella flatbread; 25gms per 5 oz. serving.

As BK001 mentioned, Real Good Foods has premade pizzas that are 8gms per 4 oz slice. Three cheese, pepperoni, and supreme. Available at Walmart.

If you're adding toppings to a flour-based holder, Joseph's It's A Wrap Lavash Bread (similar to flatbread) has 8gms per 9 oz piece. Available at Walmart.

(Other stores may carry these as well but I didn't check.)