Here's the screenplay. Ambrose is correct in that it's in a published book (along with Platoon). But it's in that weird format like all of William Goldman's published screenplays. That and it really is hard to come by. I found my copy (which is pretty boogered up at that) at Half Price Books: Bent cover. Cracked in the middle of the thing. Huge sticker that's been removed but the stickiness left behind which only collects dirt.
Ordinarily I wouldn't link to a published screenplay, but like I said, it is hard to come by.