I believe Harmy's done an '81 crawl/flyover reconstruction already (I have no link though), but it's not attached to the rest of the film. I think the goal was to have it as an extra in the Blu-ray, but I'm sure an enterprising individual could splice them together. I'd have a lot fewer issues with the '81 crawl if it didn't screw up Tatooine appearing in time with the musical cue, which is, at least to me, indicative of the general carelessness for the originals that pervades every change made to these films. And a lot of us saw Star Wars in theatres before 1981... many times.