I really like taking notes on paper, but I would prefer the convenience of my ipad.

I know... tons of notetaking apps exist. However, the reason I like paper-based notes so much is that I can get planners, organizers, and other notebooks that have a pre-built structure to their page. My problem is that I have to hand-draw any sort of outline to follow on the notes apps I have currently and I haven't been able to find any on the App Store that offer the ability to say -- upload a linked PDF or the like where I can navigate in a bigger organizer and select multiple different page layouts in the same "notebook".