Found mentions of this song on old websites

So i decided to search for a bit regarding this song, since it feels like the one way this song would be found is if it was lurking on some obscure website nobody thought to look. copied and pasted the song's japanese title into google search, searched for an upload date of about a year after the video's original upload, and found three areas where this song is mentioned.

first one was on this blog website: https://asthenosphere.blog.ss-blog.jp/2011-03-09-Vocaloid the link on this site just contains the dead niconico link and no saved video file

second one was on another blog website: http://vocaloid-watcher.seesaa.net/article/189813051.html this also contains a dead link, but a different dead link: http://tools.altemasoft.com/nicoplay/?video_id=sm13822734 not sure how useful knowing that different dead link exists, it has no archives on wayback machine and i'm pretty sure it just redirected to the original niconico link

now this may seem like it just lead to a dead end, and it did, but it solidified my theory that this song could very possibly be hiding under our nose. maybe someone reuploaded it somewhere else on some obscure website. vocaloid based websites/blogs are good places to look. i've also looked in video compilations of vocarock songs to see if there was a chance a longer snippet or even a full version of this song was there. didn't get lucky and knowing how obscure this song was when it came out that probably won't result in anything, but it's worth a shot.

note that this is my first time ever actively searching for something, it just feels like its in my grasp, so i don't know if i'm really helping here. i also don't speak japanese, which makes searching for this more difficult