Probably not as most of the reels were destroyed after being sent back from the cinemas, unless some are in private collections. I have seen reels for empire and jedi being sold on Ebay but since owning them is illegal i never put myself in harms way by bidding on them.

Plus they were faded to almost no color left and pink. And who knows what condition the mag tracks would be in since they apt to warp over time and even desintegrate.

The 70mm masters themselves if they are in the Lucasfilm Vault would most likely need to be restored if the collectible cels from willets designs are any indication. Star Wars and Empire were pre LPP Eastman Kodak. Almost all prints are useless as a source.

I wonder if they made a 70mm printing master of the special edition before adding all the cgi, even if they did it would have had the final changes and audio mixes.