I've been working on the same and ran into the same issue. If not Bandcamp, I've had success on Qobuz. Their streaming payments to artists, last I checked, are substantially higher than anywhere else I've looked. I'm hoping the same is true of their music sales but I'm sure half of that is dependent on the labels, which likely have something to do with their not being on Bandcamp... or maybe that's just my cynicism. I know little about how things work in the industry I just want to pay artists for their amazing work.