Sorry for the late reply. I don't even think they had much playable content in it. Probably only Lucasarts developers might have had access to the unfinished work, but it would have been of course, illegal to post it on the web/share it. Now that Lucasarts is dead, probably Disney trashed it completely. You can go ahead and find some of the ex-Lucasarts devs on Twitter or something.
Post back if you get any results!