I often buy tracks for myself in the ghost producer store. There's a lot of cool background that you can mix perfectly in your tracks. If you are looking for a normal melody for your track,then it will definitely be there. Or look for it on spotify, but you will only have to process the music properly. Since there are very strict rules on the placement of music now, and if there is plagiarism, then the track can be blocked. So you'll have to work hard on the change.