For the instruments I have a private plugin originally based on spleeter and I have LALAL.ai. Some tracks (like the drums) which it’s not as good for, I get my buddy to extract in FL studio (its implementation is surprisingly not terrible) since I use ableton. Sometimes the result is good, sometimes it’s not. There’s only so much you can pull out of these old tracks but the fact we can do it at all is pretty mind-blowing.
Just an FYI in case you don’t follow Cloud news but Google has deleted customers accounts on multiple occasions and has been for literal years. This time they just did it to someone large enough to make the news. I work in SRE and no longer recommend GCP to anyone.