Rikter has SP FX transferred from an NTSC laserdisc. Best quality available.
I don't think From SW to Jedi was released on laserdisc in the US. The quality of that isn't that great to begin with on the USA released VHS or the Japanese laserdisc (with subtitles), although the laserdisc is slightly better. Someone here had the idea of taking the Japanese laserdisc and masking the subtitles with the USA videotape. Anyone still working on that?