I have a really terrible mp3 copy of the JAL Mamo dub, and some improperly-made mkv with all 4 dubs, but half of them don't work w/o transcoding through eac3to. Both copies of the JAL dub I have are multi-generation and show signs of VHS speed fluctuation and lots of noise, etc.

Tbh, I am waiting on DiskoTek to release their DVD, and just use their copy of the JAL dub (it will have all 4 dubs) to add to the BD. I already have the other 3 dubs on retail DVDs, but I want to see how they retimed and cleaned up the JAL dub. Not knocking them, but I imagine that it will still require some more cutting in snips and syncing, judging by some of their sloppy dub syncing in the past. Still they have better audio software to cleanup the sound (as long as they don't go overboard and remove Vital parts in the audio like Criterion does in some of their audio "clean-up" -- see their DVD of the Red Balloon for example, having removed the air escaping from the Balloon, for example). I have enough on my plate to keep me busy w/o mucking around in the JAL Mamo dub till DT release their DVD.

If anyone wants the JAL dub, all the same, before DT release their DVD, iirc, I got the 4th generation+ mp3 VHS cap at lupinencyclopedia.com
yeah here we go:
http://lupinencyclopedia.com/anime/film/secret_of_mamo
look for the blue url link that says "mp3 version."

the one in the mkv that has all 4 dubs is improperly made. It requires reencoding the JAL and Streamline dubs, and resampling to 48k for DVD, since they are 44.1 even though encoded to AC3. They have bad header data or smth, so that basically they can't be played like they are. If anyone wants that conversion I made of the JAL dub, I can post it, but I think it is even more generations of lossy transcodes and VHS copy generations than the low-fi mp3 above.