Hi! Also a musician myself so I understand exactly what you are looking for. Luckily for me as a musician, one of my additional skill sets is graphic artist. Let me know a bit more specifically what you have but it basically sounds like you have the elements for the first song as vector, but you want to be able to edit this in the future to accommodate additional releases. So like a template of sorts. Check out my portfolio here online at freelancer and message me with any questions you have, as well as those details I asked about. Hope to hear from you soon, thanks!