Sometimes Google can be your friend. I have a account with Emusic, I will browse and see what’s out there, they have a really huge catalog of music, and all high quality files!
I used to get some stuff off Amazon untill someone pointed out that not all their stuff is 320kbs, and I looked thru some recently downloaded stuff and realized they were right. Wasn’t too long ago, maybe like a year or two ago, but maybe they changed.