By the way speaking of Lensman there is also a Japan laserdisc collection of episodes of a series, which I think was condensed for the movie version which is also available in japan on LD.
There is an official U.S. Release on LD, which Is a rare find on ebay whenever it appears, i think i is a streamline pictures release not sure though.
I to can think of many anime LD's that need preservation mainly for their superior audio and features.
There are 2 different criterion versions of akira, which I own
the ghibli box set which I own which only goes to the year 1995
the princess mononoke laserdisc which I also own.
Plus the evangelion japan laserdiscs.
I wish someone would also preserve the project a-ko letterbox LD
and the original streamline dubs of the dirty pair features.
I also have Final Yamato LD letterbox
and Be forever Yamato fullscreen LD with the stereo soundtrack.