You already have it. Host your own damn mp3s and RSS file on your own site. Here's a tool, that's 100% v4v, meaning you get to choose the split, all the way down to 0%. It builds the RSS for you. All ...
And it's open source. Contribute, fork it, make it your own. I don't care. I just want you to get your music out there.
https://github.com/thebells1111/msp-studio
https://github.com/thebells1111/msp-studio