I don't know that I'd heat up pizza in a microwave even if it was kosher. It needs an oven to get the crust right. If it were double wrapped in an oven it would probably get soggy. Do you want to tell us the occasion and we can try to figure out something else you can make? You might be able to make double wrapped burritos.
Are you asking if there are any pizzas that comes double wrapped in Al. Foil or Plastic? not that I know of.....any I don't have much experience with microwavable pizza.
How does your Rav hold on microwaves? (Ex: Does he allow for kashering a microwave first in an expedient fashion?)