Oh man, last week I had the WORST craving for pizza. I also can't have gluten, so we make our own crust. Bob's Red Mill makes an amazing gluten free pizza mix.
I believe it has corn in it, and I'm allergic to that, as well.
I don't think there is corn, I just checked: Ingredients:
grain brown rice flour, potato starch, whole grain millet flour, whole
grain sorghum flour, tapioca flour, potato flour, evaporated cane juice,
xanthan gum, active dry yeast, sea salt (magnesium carbonate as flowing
agent), guar gum
Hope that helps! It makes an amazing crust.