Looking for karaoke of this song

The Near Future City

I've always loved this song and would love to be able to cover it. I've looked around for an offvocal but I haven't been able to find one. Then again, I'm pretty bad at looking for stuff so I may have missed some really obvious sources.

Was wondering if someone could find the off vocal for me <3 I would love you forever

This song is composed of 4 different songs in the Near Future City series:
Hologram, 外界 (Outer world), 軌道エレベータ (Trail elevator), and 鉄巨人 (Iron giant)
so there isn't one single instrumental for the whole song~

Unfortunately I haven't been able to find them on piapro, but I may overlook some places, hoping someone else could find them somewhere else ;u;

Gomen haven't been much help T-T