Since this has first been posted there has been a multitude of new fan reconstructions. I’ll try my best to include them all if I can.
Godzilla vs. The Thing (1964)-
by RedMenace
Recreates the AIP version of Godzilla vs. The Thing in HD.
SOURCES:
Showa Video Blu-ray
1998 Simitar DVD
2006 Siren Visual DVD
2004 Marketing Films DVD
2007 Classic Media DVD
Ghidorah the Three Headed Monster (1964)-
by RedMenace
Recreates the Walter Reade cut in HD.
SOURCES:
Showa Video Blu-Ray
2006 Siren Visual DVD
2007 Classic Media DVD
Monster Zero (1965)-
by RedMenace
Recreates the Henry G. Saperstein/UPA cut of Invasion of the Astro Monster in HD.
SOURCES:
Showa Video Blu-ray
1998 Simitar DVD
2007 Classic Media DVD
Invasion of the Astro Monster (1965)-
by RedMenace
Recreates the Toho international cut of Invasion of the Astro Monster in HD.
SOURCES:
Showa Video Blu-Ray
1998 Simitar DVD
2007 Classic Media DVD
2014 Kraken Blu-Ray of Godzilla vs. Gigan
1998 4Front VHS
Godzilla vs. The Sea Monster (1966)-
by goji1986
Recreates the AIP Titra cut of Godzilla vs. The Sea Monster in HD.
SOURCES:
2014 Kraken Blu-Ray
Godzilla vs. The Sea Monster (1966)-
by Gorizard
Recreates the AIP Titra cut of Godzilla vs. The Sea Monster in HD.
SOURCES:
2014 Kraken Blu-Ray
1992 GoodTimes VHS
Son of Godzilla (1967)-
by RedMenace
Recreates the AIP Titra cut of Son of Godzilla in HD.
SOURCES:
Showa Video Blu-Ray
1997 Anchor Bay VHS
2004 TriStar DVD
Showa Video Blu-Ray of Godzilla’s Revenge
French DVD
Destroy All Monsters (1968)-
by RedMenace
Recreates the AIP Titra cut of Destroy All Monsters in HD.
SOURCES:
2011 Media Blasters Blu-Ray
Bootleg VHS
2006 Siren DVD
The Return of Godzilla (1984)-
by Servanov
“EOST” version (English On Screen Text), recreates the International version of ROG as seen in 1998 Carlton VHS in HD.
SOURCES:
2016 Kraken Blu-Ray
2014 Sony Blu-Ray of Godzilla vs. Destoroyah
1998 Carlton PAL VHS
2006 MonstersHD Broadcast Capture of Godzilla 1985
German LaserDisc
Godzilla 1985 (1985)-
by RedMenace
Recreates the American version of The Return of Godzilla, Godzilla 1985 in HD.
2016 Kraken Blu-Ray
2006 MonstersHD Broadcast Capture of Godzilla 1985
2016 Blu-Ray of Creepshow 2
That’s about it from what I could find. RedMenace seems to be taking a break from reconstructions. AS you saw, I made a reconstruction myself. I am planning, in the future, to make a 16mm Recreation of ROG, and a Godzilla vs. Biollante Reconstruction. All these can be found on archive.org, except the EOST version of The Return of Godzilla, which you can PM me to get the link for. Hope this helps!