What is the source for these theatrical 2.0 stereo soundtracks for each movie?

I'm surprised hairy_hen's restored theatrical 70mm stereo soundtrack for Star Wars might not be included. Since this would be the 70mm theatrical soundtrack down-mixed to stereo by Lucasfilm, with the unneeded few changes that were added to the 1993 DC soundtrack having been removed and those places in the soundtrack being restored as it was before the DC. And since the source for almost all the restored 70mm stereo soundtrack is the excellent 1993 DC, the sound quality would be very high. Making it the ultimate recreation in stereo form of the real Star Wars 70mm theatrical soundtrack. :)

Naturally, there is only so much space available on the dual-layer DVD, so everything can't be included with good bit-rates (essential for sound quality).

Hopefully the DVD audio and video tech experts here on the forum will make available dark_jedi's great-looking restored video with various soundtrack options at high bit-rates that couldn't all be fit on the initial DVD version. :)