Looks like all the usual suspects are out of stock, possibly for good (it was a limited edition deal, after all). That’s a shame – even for those who prefer the unaltered films via some fan preservation and my synced Navajo track, I’d always recommend they buy the real deal. Not just because those are the fan edit rules, but because the Navajo voice artists really deserve whatever share of the proceeds they would have gotten, and then some. They did great work.
I believe the latest Despecialized Edition has the Navajo audio (modified to sync and remove SE elements), and Navajo “titles” subtitles in SRT format for the onscreen text. Project Threepio has those subtitles in other formats. This may be all that’s widely available anymore.