What about using some material from Opengameart?

[Auria]

Hi KroArtem,
I'm not a lawyer, but my understanding is that public domain allows you to do whatever you want with the resource So if you're fine with CC-BY-SA 3.0 let's use this license

[Arthur]

City: I like this one very much. I have great memories playing tracks with this song in it.

Just a little question; only this track got this music, right?
If you count add-ons, I think there was one with it as well.

[Static Juice]

Yes, only the city track and the three battle maps had this music.
Can't remember whether some of the addons do or not.

[Arthur]

Okay. Well, I don't think the music in that track is too good. But City might not be included in 0.7, so that makes it just battle map related in that case, which might be a better use (I don't battle much).

I should have made Penguin Party better... Oh well.

[Static Juice]

But City might not be included in 0.7

Well that's a shame, becuase City is one of my favourite tracks. I do think this track could be included in the game if it was improved significantly, such as the track being less steep in parts, but it's up to the developers whether this track gets included or not. If it doesn't then maybe someone could package it as an addon track.

[Arthur]

Yeah, it will probably be an addon if anyone does the necessary porting needed, and if it gets improved as well (flattening it out), I reckon the developers might change their mind. But as it's now, it's one of the more likely tracks to get thrown out of the main game.

[Auria]

Beyond the steep parts, it's also too narrow (and too long). This track is good for solo races, but against others it's hard to overtake them because the road is too narrow