[archival]Fully lost? The hall of mirrors band

Hi everyone,
I need help tracking down lost music and videos from an early 2010s London dream-pop band called The Hall of Mirrors, fronted by artist Jessica Winter (who went by Jessica Spencer back then aswell as Jessica potter)
I’ve spent the last few months doing intense research but I've finally hit a brick wall.

What I have:
Hundreds of rare photos from the band's era.
9 recovered tracks (one is missing a title).
2 working videos (one is glitchy)
A master list of all their old official website links, MySpace URLs, and social media pages.

I have a list of 20–25 tracks that are completely lost. The Wayback Machine won't load the audio because of dead Flash players and the old MySpace server wipe. On top of that, several important live performance videos (like their 2013 set at The Lexington) have been set to private on YouTube.

I have all the exact track titles and private video links ready to go. I just need extra help from anyone skilled at deep archival digging, scraping old music blogs, or hunting down files in the MySpace data rescue dumps (like LostMySpace/Dragon's Hoard).

If anyone at all could help me it would be greatly appreciated as preserving this work is extremely important to me & would make me the happiest!