Where can i find blueprints?

I am doing a project for my technical drawing class.

I want to do a boeing 747 OR other modern non military aircrafts. WHere can i find floorplans and basic detail so i can draw it. i’m not looking at full on detailed blueprints of nuts right down to the nuts and bots but a “overall” blueprint.

does anyone know where i can get this? I don;t mind if i have to pay for it!

PLEASE do not post urls that lead to a serach result, i’ve been seraching for a very vert long time.