Several collectors claim to have the VHS but refuse to rip it. One seller offered to play it in-store for ¥10,000 ($65 USD). When asked about "Glass no Umi," he laughed and said, "Sore wa maboroshi" (That’s an illusion).
However, the hunt for the link is what keeps the name alive. If you are patient, use the archival methods described above, and avoid scams, you can piece together the mosaic. You might find a photo set from 1998. You might find a 2-minute clip from a forgotten film. You might find a fan wiki with a single functioning external link. maki tomoda link
The keyword is too polluted with fan fiction and clickbait articles (like this one). Use marginal search engines like Marginalia or Wiby that index old, text-only personal websites. Several collectors claim to have the VHS but