I think Giordanos pizza delivers and that is decent. I know they deliver to pop, so I would guess akl as well. They have several locations in kissimmee/orlando, I know one of them will deliver to wdw.
Order from a real pizza place. Giordanos is probably as good as any. You could order from Dominos, if you like their pizza.
Don't order from any place that shove a menu under your door. The "good" places heat a pizza from COSTCO or Target in a garage. The "bad" places steal your credit card information and don't deliver anything.