the closest thing we have to the theatrical release in good quality is ocpmovies star wars classic edition, which among other things re-creates the original opening crawl pre-anh. Then theres the edit droid with the mono mix. now if only at some point in the future someone could come across a print of a pre-anh 16mm or 35mm star wars print.
too bad the 70mm's no longer exist because i'd love to see the whole trilogy in this format.