Hopefully these may be of some use - though best check the exact times to see if they match Harmy’s DeSepecialized Editions…
At least you’ll have the Chapter Titles and an approximate time (seems you can download in an .xml file or .txt file too)…
SW - http://www.chapterdb.org/browse/39
ESB - http://www.chapterdb.org/browse/1011
ROTJ - http://www.chapterdb.org/browse/120983
Yeh i checked on my disc with those and they’re mostly within a second or two.