When I was in high school (early 90s) my friend's dad had an original script for Star Wars, and it looked basically like the linked one and what you described -

When I was in high school (early 90s) my friend's dad had an original script for Star Wars, and it looked basically like the linked one and what you described - a stack of xeroxed, typed, 8.5x11 pages stapled together. One thing that makes me think the one I saw was authentic was that Jabba the Hutt made an appearance when Han Solo and the gang were leaving Luke's home planet, except instead of being a space slug he was just some dude. I never knew what to make of that until years later when they digitally edited the slug version of him into that scene.