Make a disposable e-mail, sign up for a month trial for Qobuz or Tidal and use a program like StreamRip to just download high-quality music straight from the platform.
When the trial ends, just make a new e-mail and repeat.
Someone mentioned Lucida here, which is more straightforward, but I found it slow and often failing. Once you’re signed up, downloading is easy and it’s the easiest way to get more obscure stuff in high quality.