hate to say this in the suggestions/requests board but just do it yourself
its easy to do, just download audacity, after getting the songs.
snip them, make sure its mono and less than 30 seconds, then put it in the game.
its a fun learning experience to make addons and after you made these two songs, you can make any other songs you want.
you will be completely independent, and can even upload them to the addons board for the rest of the community to use.