I found my copy of it on Usenet and used MKVToolNix GUI to convert it after extracting it.
Go to > BDMV > PLAYLIST, drag and drop the 00001.mpls Playlist file into MKVToolNix GUI then run it. The MKV will include the chapters for easy searching. The MKV will be 1 to 1 ratio so there will not be any loss in quality.
A question though… How does one get access to the spleen? Looks like we are not accepting invites at this time.