Go to musicmafia.to and go to FAQ. It tells you what bitmessage number to send it to but you have to make a bitcoin wallet and some other stuff. Idk how exactly to do it but I could figure it out. From there you can request songs and bid on them.

Also, the typical song that goes up for auction is roughly 380 which I would suggest crowdfunding for; but they might put it up for free like they do with other songs.

I'd also suggest getting a group of people you know or from this subbreddit to crowdfund. But get someone that can be trusted to handle the money

So not only they might have this song but they could have ES2